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Espinosa O, Mora L, Sanabria C, Ramos A, Rincón D, Bejarano V, Rodríguez J, Barrera N, Álvarez-Moreno C, Cortés J, Saavedra C, Robayo A, Franco OH. Predictive models for health outcomes due to SARS-CoV-2, including the effect of vaccination: a systematic review. Syst Rev 2024; 13:30. [PMID: 38229123 PMCID: PMC10790449 DOI: 10.1186/s13643-023-02411-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 12/04/2023] [Indexed: 01/18/2024] Open
Abstract
BACKGROUND The interaction between modelers and policymakers is becoming more common due to the increase in computing speed seen in recent decades. The recent pandemic caused by the SARS-CoV-2 virus was no exception. Thus, this study aims to identify and assess epidemiological mathematical models of SARS-CoV-2 applied to real-world data, including immunization for coronavirus 2019 (COVID-19). METHODOLOGY PubMed, JSTOR, medRxiv, LILACS, EconLit, and other databases were searched for studies employing epidemiological mathematical models of SARS-CoV-2 applied to real-world data. We summarized the information qualitatively, and each article included was assessed for bias risk using the Joanna Briggs Institute (JBI) and PROBAST checklist tool. The PROSPERO registration number is CRD42022344542. FINDINGS In total, 5646 articles were retrieved, of which 411 were included. Most of the information was published in 2021. The countries with the highest number of studies were the United States, Canada, China, and the United Kingdom; no studies were found in low-income countries. The SEIR model (susceptible, exposed, infectious, and recovered) was the most frequently used approach, followed by agent-based modeling. Moreover, the most commonly used software were R, Matlab, and Python, with the most recurring health outcomes being death and recovery. According to the JBI assessment, 61.4% of articles were considered to have a low risk of bias. INTERPRETATION The utilization of mathematical models increased following the onset of the SARS-CoV-2 pandemic. Stakeholders have begun to incorporate these analytical tools more extensively into public policy, enabling the construction of various scenarios for public health. This contribution adds value to informed decision-making. Therefore, understanding their advancements, strengths, and limitations is essential.
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Affiliation(s)
- Oscar Espinosa
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS) & Economic Models and Quantitative Methods Research Group, Centro de Investigaciones para el Desarrollo, Universidad Nacional de Colombia, Bogotá, D.C., Colombia.
| | - Laura Mora
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS), Bogotá, Colombia
| | - Cristian Sanabria
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS), Bogotá, Colombia
| | - Antonio Ramos
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS) & Economic Models and Quantitative Methods Research Group, Centro de Investigaciones para el Desarrollo, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
| | - Duván Rincón
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS), Bogotá, Colombia
| | - Valeria Bejarano
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS) & Economic Models and Quantitative Methods Research Group, Centro de Investigaciones para el Desarrollo, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
| | - Jhonathan Rodríguez
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS) & Economic Models and Quantitative Methods Research Group, Centro de Investigaciones para el Desarrollo, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
| | - Nicolás Barrera
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS), Bogotá, Colombia
| | | | - Jorge Cortés
- Faculty of Medicine, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
| | - Carlos Saavedra
- Faculty of Medicine, Universidad Nacional de Colombia, Bogotá, D.C., Colombia
| | - Adriana Robayo
- Directorate of Analytical, Economic and Actuarial Studies in Health, Instituto de Evaluación Tecnológica en Salud (IETS), Bogotá, Colombia
| | - Oscar H Franco
- University Medical Center Utrecht, Utrecht University & Harvard T.H. Chan School of Public Health, Harvard University, Cambridge, USA
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Matusik R, Nowakowski A. Dual ɛ-closed-loop Nash equilibrium method to study pandemic by numerical analysis. Phys Rev E 2023; 107:044202. [PMID: 37198782 DOI: 10.1103/physreve.107.044202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 03/15/2023] [Indexed: 05/19/2023]
Abstract
In this paper, an approach to the disease transmission dynamic of a coronavirus pandemic is presented. Compared to models commonly known from the literature, new classes that describe this dynamic to our model were added, which are a class representing costs of the pandemic and a class of the individuals being vaccinated but without antibodies. Parameters which at most of them depend on time were used. Sufficient conditions for a dual ɛ-closed-loop Nash equilibrium in the form of the verification theorem are formulated. A numerical algorithm and numerical example are constructed.
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Affiliation(s)
- Radosław Matusik
- Faculty of Mathematics and Computer Science, University of Lodz, 90-238 Lodz, Poland
| | - Andrzej Nowakowski
- Faculty of Mathematics and Computer Science, University of Lodz, 90-238 Lodz, Poland
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Stefanizzi P, Bianchi FP, Martinelli A, Di Lorenzo A, De Petro P, Graziano G, Lattanzio S, Diella G, Stella P, Ancona D, Tafuri S. Safety profile of MenB-FHBp vaccine among adolescents: data from surveillance of Adverse Events Following Immunization in Puglia (Italy), 2018-2020. Hum Vaccin Immunother 2022; 18:2041359. [PMID: 35201942 PMCID: PMC9009947 DOI: 10.1080/21645515.2022.2041359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
MenB-FHBp was licensed in Europe in 2017 from the age of 10. In the “postmarketing life” of a new vaccine, surveillance of Adverse Events Following Immunization (AEFI) is crucial, to better understand the pattern of safety and the effectiveness. This paper describes the MenB-FHBp AEFIs notified in Puglia in 2018–2021, to take a picture of the safety profile of this vaccine in the real life, four years after its introduction in Italy. This is a retrospective observational study. Data were collected from the list of AEFIs notified after MenB-FHBp vaccine administration in Puglia in 2018–2020, and the number of doses of this vaccine administered in the same period. AEFIs were classified according to WHOʻs algorithm, and causality assessment was carried out for serious AEFIs. From January 2018 to December 2020, in Puglia, 43,061 doses of MenB-FHBp were administered and 42 MenB-FHBp AEFIs (reporting rate: 97.5 per 100,000 doses administered) were reported. Among these, 12 were classified as severe (28.6%; reporting rate 27.9 per 100,000 doses). Overall, the male/female ratio in AEFIs was 1:1. The median age of people who suffered from AEFIs was 12 years (range 11–13). For the 11 serious AEFIs for which the classification was “consistent causal association,” the diagnosis was hyperpyrexia (reporting rate 13.9 per 100,000 doses), fainting (rate 4.6 per 100,000 doses), urticaria (rate 2,3 per 100,000 doses), convulsions (rate 2,3 per 100,000 doses), and vomit (rate 2,3 per 100,000 doses). No deaths or impairment were notified in studied AEFIs. The picture of MenB-FHBp vaccine supports that the risk of AEFIs is in line with previous published data and in general acceptable.
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Affiliation(s)
- Pasquale Stefanizzi
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Francesco Paolo Bianchi
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Andrea Martinelli
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Antonio Di Lorenzo
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Paola De Petro
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Giusi Graziano
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Sabrina Lattanzio
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Giusy Diella
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
| | - Paolo Stella
- Regional Pharmacovigilance Center, Puglia Region, Italy
| | | | - Silvio Tafuri
- Department of Biomedical Science and Human Oncology, Aldo Moro University of Bari, Bari, Italy
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Fisher L, Sandberg A. A Safe Governance Space for Humanity: Necessary Conditions for the Governance of Global Catastrophic Risks. GLOBAL POLICY 2022; 13:792-807. [PMID: 37056960 PMCID: PMC10084266 DOI: 10.1111/1758-5899.13030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 06/19/2023]
Abstract
The world faces a multiplicity of global catastrophic risks (GCRs), whose functionality as individual and collective complex adaptive networks (CANs) poses unique problems for governance in a world that itself comprises an intricately interlinked set of CANs. Here we examine necessary conditions for new approaches to governance that consider the known properties of CANs-especially that small changes in one part of the system can cascade and amplify throughout the system and that the system as a whole can also undergo rapid, dramatic, and often unpredictable change with little or no warning.
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Affiliation(s)
- Len Fisher
- School of PhysicsUniversity of BristolBristolUK
| | - Anders Sandberg
- Future of Humanity InstituteOxford Martin SchoolUniversity of OxfordOxfordUK
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Whitworth HS, Kitonsa J, Kasonia K, Tindanbil D, Kafeero P, Bangura J, Nije Y, Tetsa Teta D, Greenwood B, Kavunga-Membo H, Leigh B, Ruzagira E, Gallagher KE, Watson-Jones D. COVID-19 Vaccine Acceptability Among Healthcare Facility Workers in Sierra Leone, the Democratic Republic of Congo and Uganda: A Multi-Centre Cross-Sectional Survey. Int J Public Health 2022; 67:1605113. [PMID: 36213138 PMCID: PMC9537362 DOI: 10.3389/ijph.2022.1605113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 09/08/2022] [Indexed: 11/13/2022] Open
Abstract
Objectives: This cross-sectional survey explored COVID-19 vaccine acceptability among public healthcare facility workers in Kambia (Sierra Leone), Goma (Democratic Republic of Congo) and Masaka (Uganda). Methods: Questionnaire-based interviews conducted between April-October 2021 explored participants' knowledge and perceptions of, and attitudes towards, the COVID-19 pandemic and COVID-19 vaccines, as well as COVID-19 vaccine acceptability (defined as uptake of ≥1 dose or intent to get vaccinated). Results: Whilst most (n = 444; 81.8%) of the 543 participants had one or more concerns about COVID-19 vaccines, 487 (89.7%) nonetheless perceived that they were important for pandemic control. Most participants from Kambia or Masaka either were vaccinated (n = 137/355; 38.6%) or intended to get vaccinated (n = 211/355; 59.4%) against COVID-19. In Goma, all 188 participants were unvaccinated; only 81 (43.1%) participants intended to get vaccinated, and this was associated with positive perceptions about COVID-19 vaccines. In Goma, the most common reasons for not wanting a COVID-19 vaccine were concerns that the vaccines were new (n = 75/107; 70.1%) and fear of side effects (n = 74/107; 69.2%). Conclusion: Reported COVID-19 vaccine acceptability was high among healthcare facility workers in Kambia and Masaka. The lower vaccine acceptability in Goma may highlight the importance of social mobilisation and accurate, accessible information that addresses specific concerns.
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Affiliation(s)
- Hilary S. Whitworth
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
| | - Jonathan Kitonsa
- Medical Research Council (MRC)/Uganda Virus Research Institute (UVRI) and London School of Hygiene and Tropical Medicine (LSHTM) Uganda Research Unit, Entebbe, Uganda
| | - Kambale Kasonia
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- Institut National de Recherche Biomédicale (République démocratique du Congo), Kinshasa, Democratic Republic of Congo
| | - Daniel Tindanbil
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown, Sierra Leone
| | - Paddy Kafeero
- Medical Research Council (MRC)/Uganda Virus Research Institute (UVRI) and London School of Hygiene and Tropical Medicine (LSHTM) Uganda Research Unit, Entebbe, Uganda
| | - Joseph Bangura
- College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown, Sierra Leone
- Ministry of Health and Sanitation (Sierra Leone), Freetown, Sierra Leone
| | - Yusupha Nije
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown, Sierra Leone
| | - Darius Tetsa Teta
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- Institut National de Recherche Biomédicale (République démocratique du Congo), Kinshasa, Democratic Republic of Congo
| | - Brian Greenwood
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
| | - Hugo Kavunga-Membo
- Institut National de Recherche Biomédicale (République démocratique du Congo), Kinshasa, Democratic Republic of Congo
| | - Bailah Leigh
- College of Medicine and Allied Health Sciences, University of Sierra Leone, Freetown, Sierra Leone
| | - Eugene Ruzagira
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- Medical Research Council (MRC)/Uganda Virus Research Institute (UVRI) and London School of Hygiene and Tropical Medicine (LSHTM) Uganda Research Unit, Entebbe, Uganda
| | - Katherine E. Gallagher
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- KEMRI Wellcome Trust Research Programme, Kilifi, Kenya
| | - Deborah Watson-Jones
- London School of Hygiene and Tropical Medicine, University of London, London, United Kingdom
- Mwanza Intervention Trials Unit, Mwanza, Tanzania
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Real-Life Safety Profile of the 9-Valent HPV Vaccine Based on Data from the Puglia Region of Southern Italy. Vaccines (Basel) 2022; 10:vaccines10030419. [PMID: 35335051 PMCID: PMC8948997 DOI: 10.3390/vaccines10030419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/01/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022] Open
Abstract
Human Papillomavirus (HPV) is responsible for epithelial lesions and cancers in both males and females. The latest licensed HPV vaccine is Gardasil-9®, a 9-valent HPV vaccine which is effective not only against the high-risk HPV types, but also against the ones responsible for non-cancerous lesions. This report describes adverse events following Gardasil-9® administration reported in Puglia, southern Italy, from January 2018 to November 2021. This is a retrospective observational study. Data about the adverse events following immunization (AEFIs) with Gardasil-9® were collected from the Italian Drug Authority database. AEFIs were classified as serious or non-serious accordingly to World Health Organization guidelines, and serious ones underwent causality assessment. During the study period, 266,647 doses of 9vHPVv were administered in Puglia and 22 AEFIs were reported, with a reporting rate (RR) of 8.25 per 100,000 doses. The most reported symptoms were neurological ones (7/22). A total of 5 (22.7%) AEFIs were classified as serious, and 2 of these led to the patient’s hospitalization. In one case, permanent impairment occurred. Following causality assessment, only 2 out of 5 serious AEFIs were deemed to be consistently associated with the vaccination (RR: 0.750 per 100,000 doses). The data gathered in our study are similar to the pre-licensure evidence as far as the nature of the AEFIs is concerned. The reporting rate, though, is far lower than the ones described in clinical trials, likely due to the different approach to data collection: in our study, data were gathered via passive surveillance, while pre-marketing studies generally employ active calls for this purpose. Gardasil-9®’s safety profile appears to be favorable, with a low rate of serious adverse events and a risk/benefits ratio pending for the latter.
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Abrignani MG, Murrone A, De Luca L, Roncon L, Di Lenarda A, Valente S, Caldarola P, Riccio C, Oliva F, Gulizia MM, Gabrielli D, Colivicchi F. COVID-19, Vaccines, and Thrombotic Events: A Narrative Review. J Clin Med 2022; 11:948. [PMID: 35207220 PMCID: PMC8880092 DOI: 10.3390/jcm11040948] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/08/2022] [Accepted: 02/09/2022] [Indexed: 02/05/2023] Open
Abstract
The coronavirus disease 2019 (COVID-19), a deadly pandemic that has affected millions of people worldwide, is associated with cardiovascular complications, including venous and arterial thromboembolic events. Viral spike proteins, in fact, may promote the release of prothrombotic and inflammatory mediators. Vaccines, coding for the spike protein, are the primary means for preventing COVID-19. However, some unexpected thrombotic events at unusual sites, most frequently located in the cerebral venous sinus but also splanchnic, with associated thrombocytopenia, have emerged in subjects who received adenovirus-based vaccines, especially in fertile women. This clinical entity was soon recognized as a new syndrome, named vaccine-induced immune thrombotic thrombocytopenia, probably caused by cross-reacting anti-platelet factor-4 antibodies activating platelets. For this reason, the regulatory agencies of various countries restricted the use of adenovirus-based vaccines to some age groups. The prevailing opinion of most experts, however, is that the risk of developing COVID-19, including thrombotic complications, clearly outweighs this potential risk. This point-of-view aims at providing a narrative review of epidemiological issues, clinical data, and pathogenetic hypotheses of thrombosis linked to both COVID-19 and its vaccines, helping medical practitioners to offer up-to-date and evidence-based counseling to their often-alarmed patients with acute or chronic cardiovascular thrombotic events.
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Affiliation(s)
| | - Adriano Murrone
- Cardiology-UTIC, Hospitals of Città di Castello and Gubbio-Gualdo Tadino, AUSL Umbria 1, 06100 Perugia, Italy;
| | - Leonardo De Luca
- Cardiology, Cardio-Thoraco-Vascular Department, San Camillo Forlanini Hospital, 00100 Rome, Italy; (L.D.L.); (D.G.)
| | - Loris Roncon
- Cardiology Department, Santa Maria della Misericordia Hospital, 45100 Rovigo, Italy;
| | - Andrea Di Lenarda
- Cardiovascular and Sports Medicine Department, Azienda Sanitaria Universitaria Giuliano Isontina-ASUGI, 34100 Trieste, Italy;
| | - Serafina Valente
- Clinical Surgical Cardiology (UTIC), A.O.U. Senese, Santa Maria alle Scotte Hospital, 53100 Siena, Italy;
| | | | - Carmine Riccio
- Follow-Up of the Post-Acute Patient Unit, Cardio-Vascular Department, A.O.R.N. Sant’Anna and San Sebastiano, 81000 Caserta, Italy;
| | - Fabrizio Oliva
- Cardiology 1-Hemodynamics, Cardiological Intensive Care Unit, Cardiothoracovascular Department “A. De Gasperis”, ASST Grande Ospedale Metropolitano Niguarda, 20100 Milan, Italy;
| | - Michele M. Gulizia
- Cardiology Department, Garibaldi-Nesima Hospital, Company of National Importance and High Specialization “Garibaldi”, 95100 Catania, Italy;
- Heart Care Foundation, 50121 Florence, Italy
| | - Domenico Gabrielli
- Cardiology, Cardio-Thoraco-Vascular Department, San Camillo Forlanini Hospital, 00100 Rome, Italy; (L.D.L.); (D.G.)
| | - Furio Colivicchi
- Clinical and Rehabilitation Cardiology Department, Presidio Ospedaliero San Filippo Neri—ASL Roma 1, 00100 Rome, Italy;
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Di Lorenzo A, Bianchi FP, Martinelli A, Lattanzio S, Carbonara A, Diella G, Tafuri S, Stefanizzi P. Safety Profile of Recommended Vaccinations in Adolescents: Data from Surveillance of Adverse Events Following Immunization in Puglia (Italy), 2016-2020. Vaccines (Basel) 2021; 9:vaccines9111302. [PMID: 34835232 PMCID: PMC8625412 DOI: 10.3390/vaccines9111302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 12/02/2022] Open
Abstract
Adolescence is a critical period for immunization, in which the adhesion rate to recommended vaccinations is often lower than desired. Since the safety of new vaccines is one of the most important factors determining vaccination hesitancy, post-marketing surveillance of adverse events following immunization (AEFIs) is recommended by the World Health Organization (WHO) to better understand the safety of these drugs. This report describes AEFIs notified in Puglia (Italy) after recommended vaccinations in adolescents aged 12 to 18 years in 2016–2020 to determine the safety profile of these products in a real-life scenario. This is a retrospective observational study. Data were gathered from the list of AEFIs notified in subjects between 12 and 18 years of age following administration of recommended vaccines in Puglia in 2016–2020. AEFIs were classified according to the WHO’s decisional algorithm, and causality assessment was carried out for serious AEFIs. From 2016 to 2020, 323,627 doses of vaccine were administered to adolescents in Puglia and 50 AEFIs were reported (reporting rate: 15.4 × 100,000 doses). Of these, 17 (34.0%) were classified as serious, and causality assessment identified 13 of them (76.5%) as vaccine related. The most common symptoms were local reactions, fever and neurological symptoms. No deaths were notified. The benefits of immunization in adolescents appear to be greater than the risk of AEFIs for all studied vaccines; in fact, AEFIs occur in less than 0.1‰ of patients and are generally mild and self-limiting.
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Affiliation(s)
| | | | | | | | | | | | - Silvio Tafuri
- Correspondence: ; Tel.: +39-0805594275; Fax: +39-0805478472
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Arutkin M, Faranda D, Alberti T, Vallée A. Delayed epidemic peak caused by infection and recovery rate fluctuations. CHAOS (WOODBURY, N.Y.) 2021; 31:101107. [PMID: 34717319 DOI: 10.1063/5.0067625] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/13/2021] [Indexed: 06/13/2023]
Abstract
Forecasting epidemic scenarios has been critical to many decision-makers in imposing various public health interventions. Despite progresses in determining the magnitude and timing of epidemics, epidemic peak time predictions for H1N1 and COVID-19 were inaccurate, with the peaks delayed with respect to predictions. Here, we show that infection and recovery rate fluctuations play a critical role in peak timing. Using a susceptible-infected-recovered model with daily fluctuations on control parameters, we show that infection counts follow a lognormal distribution at the beginning of an epidemic wave, similar to price distributions for financial assets. The epidemic peak time of the stochastic solution exhibits an inverse Gaussian probability distribution, fitting the spread of the epidemic peak times observed across Italian regions. We also show that, for a given basic reproduction number R0, the deterministic model anticipates the peak with respect to the most probable and average peak time of the stochastic model. The epidemic peak time distribution allows one for a robust estimation of the epidemic evolution. Considering these results, we believe that the parameters' dynamical fluctuations are paramount to accurately predict the epidemic peak time and should be introduced in epidemiological models.
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Affiliation(s)
- Maxence Arutkin
- UMR CNRS 7083 Gulliver, ESPCI Paris, 10 rue Vauquelin, 75005 Paris, France
| | - Davide Faranda
- Laboratoire des Sciences du Climat et de l'Environnement, CEA Saclay l'Orme des Merisiers, UMR 8212 CEA-CNRS-UVSQ, Université Paris-Saclay & IPSL, 91191 Gif-sur-Yvette, France
| | - Tommaso Alberti
- INAF-Istituto di Astrofisica e Planetologia Spaziali, via del Fosso del Cavaliere 100, 00133 Rome, Italy
| | - Alexandre Vallée
- Department of Clinical Research and Innovation, Foch hospital, 92150 Suresnes, France
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Open Business Model of COVID-19 Transformation of an Urban Public Transport System: The Experience of a Large Russian City. JOURNAL OF OPEN INNOVATION: TECHNOLOGY, MARKET, AND COMPLEXITY 2021; 7. [PMCID: PMC9906701 DOI: 10.3390/joitmc7030171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Dialectics, or developmental transformation, would eventually cause any system to change. The level and depth of these changes vary and depend on the power of external influence and system reservation mechanisms. The art of managing system processes consists of two main aspects. The first aspect involves the sagacity of managers and predicting general environmental change trends (and their impacts on the managed system). The second involves adjusting to these trends, maximizing possible benefits, and minimizing the negative manifestations of this process. Innovation plays an important role, contributing to system transformations with maximal effect and minimal loss. Public transport systems are important elements in cities, as they provide spatial mobility for at least half of the citizens of a city who cannot use individual transportation. Modern urbanization and peculiarities of the social–economic statuses of many citizens contribute to the fact that organized public transportation is unprofitable. The low solvency of citizens who use public transportation services means that passenger transport systems do not work with enough profitability. As a result, governing institutions often choose to subsidize unprofitable transporter activities, thereby prolonging the functioning of unprofitable routes. This is possible only in conditions of sustainability (in regards to a non-optimal system), when the environment is calm, and its negative impact is low. “Black swans” (according to N. Taleb) are bifurcation factors that break the sustainability of non-optimal system. Urban public transport (UPT) of a large Russian city, Tyumen, experienced it in 2020, in connection with the COVID-19 lockdown. The sharp decrease in population mobility in Tyumen, in 2020–2021, caused the need for a complete transformation of the transport service system. However, managers did not want to fundamentally change a system that consensually suited most counterparties. The search for new balances in a system that demands transformation is one way for sustainable provision. This article looks at the transformation and sustainability of a UPT system in the large Russian city of Tyumen, under conditions affected by the negative impact of COVID-19. Results of a comparative (i.e., pre-crisis (2019) and crisis (2020)) Pareto analysis of the contributions of different UPT routes are presented. Transformation of the structure of the UPT route system can overcome the “crisis” COVID-19 period and minimize its financial-economic costs.
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Vallée A, Chan-Hew-Wai A, Bonan B, Lesprit P, Parquin F, Catherinot É, Choucair J, Billard D, Amiel-Taieb C, Camps È, Cerf C, Zucman D, Fourn E. Oxford-AstraZeneca COVID-19 vaccine: need of a reasoned and effective vaccine campaign. Public Health 2021; 196:135-137. [PMID: 34198072 PMCID: PMC8169320 DOI: 10.1016/j.puhe.2021.05.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 05/25/2021] [Indexed: 12/16/2022]
Abstract
Objectives A strong COVID-19 vaccine campaign is needed to reach the herd immunity and reduce this pandemic infection. Study design In the Foch Hospital, France, in February 2021, 451 healthcare workers were vaccinated by a first dose of AstraZeneca vaccine. Methods Adverse effects were reported to our pharmaco-vigilance circuit, by an online and anonymous questionnaire following the first weeks of the vaccinal campaign to healthcare workers. Results Two hundred seventy-four (60.8%) of them reported multiple adverse effects. Main adverse effects reported were feverish state/chills (65.7%), fatigue/physical discomfort (62.4%), arthralgia/muscle pain (61.0%) and fever (44.5%). Conclusions On March 2021 many European countries suspended AstraZeneca vaccine for one week due to safety uncertainty. Thus, confidence in its efficacy is undermined. However, the benefit/risk balance is clearly in favor of vaccination.
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Affiliation(s)
- A Vallée
- Department of Clinical Research and Innovation, Foch Hospital, Suresnes, France.
| | | | - B Bonan
- Hospital Pharmacy, Foch Hospital, Suresnes, France
| | - P Lesprit
- Department of Hygiene and Infectious Disease, Foch Hospital, Suresnes, France
| | - F Parquin
- Intensive Respiratory Care Department, Foch Hospital, Suresnes, France
| | - É Catherinot
- Department of Pneumology, Foch Hospital, Suresnes, France
| | - J Choucair
- Department of Pneumology, Foch Hospital, Suresnes, France
| | - D Billard
- Department of Oncology, Foch Hospital, Suresnes, France
| | - C Amiel-Taieb
- Department of Occupational Health, Foch Hospital, Suresnes, France
| | - È Camps
- Hospital Pharmacy, Foch Hospital, Suresnes, France
| | - C Cerf
- Department of Intensive Care, Foch Hospital, Suresnes, France
| | - D Zucman
- Department of Internal Medicine, Réseau Ville Hôpital Val de Seine, Foch Hospital, Suresnes, France
| | - E Fourn
- Department of Internal Medicine, Réseau Ville Hôpital Val de Seine, Foch Hospital, Suresnes, France
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