A postmortem study of patients vaccinated for SARS-CoV-2 in Colombia

INTRODUCTION AND OBJECTIVE

A new coronavirus produces a disease designated as coronavirus disease 2019 (COVID-19). Vaccination against COVID-19 has resulted in decreased mortality. Postmortems of vaccinated patients play an important part in the forensic analysis of adverse effects after vaccination, which is essential for determining its efficacy and security. The main objective of this study was to describe the results of autopsies of patients vaccinated for SARS-CoV-2 carried out in two major centers in Colombia.

MATERIALS AND METHODS

A descriptive cross-sectional study of 121 autopsies was performed following Colombian regulations in two main hospitals in Bogotá, Colombia, between March 1st and April 31st, 2021.

RESULTS

118 of the 121 patients (97.52%) had been vaccinated with CoronaVac (Sinovac); only 3 had received other vaccines. Sudden cardiac death was the leading cause of death, with pulmonary embolism another critical finding. No relation between the cause of death and vaccination against SARS-CoV-2 was found.

CONCLUSIONS

A clinical autopsy is a vital for an accurate post-mortem diagnosis. Any relation between the SARS-CoV-2 vaccine and the cause of death should be carefully studied in order to provide the general public with evidence-based information about the safety of the vaccination.

History of influenza immunization in COVID-19 patients: impact on mortality

INTRODUCTION

In the context of the COVID-19 pandemic, there is concern regarding the impact of the influenza season.

OBJECTIVE

To analyze the impact of influenza immunization history on patients with SARS-CoV-2 infection.

METHODS

Patients older than 18 years with COVID-19, registered between March and August 2020, were included. Data were analyzed using Fisher's exact test and Student's t-test. To evaluate the impact on mortality, a logistic regression model was used; the relationship between the percentage of patients who received the influenza vaccine and mortality was determined with Pearson's correlation coefficient.

RESULTS

16,879 participants were included; 17 % had a history of influenza vaccination. Mortality was lower in the group with a history of vaccination (3.5 % vs. 7 %, p < 0.0001). The vaccination rate had an inverse relationship with the mortality rate (Pearson's r: -0.922, p = 0.026).

CONCLUSIONS

Previous influenza immunization was an independent protective factor for mortality in patients with COVID-19. Although further studies are needed to determine a causal relationship, it would be reasonable to increase influenza immunization in the general population.

Are patients with inflammatory bowel disease receiving adequate immunisation?

INTRODUCTION

Inflammatory Bowel Disease (IBD) treatment may increase the risk of infections. Vaccines are part of the comprehensive IBD patient care. The aim of this study was to describe indications and adherence of immunizations in IBD and identify possible associated factors.

METHODS

A cross-sectional, analytic study was conducted in patients from an IBD Program of a tertiary center in Chile, between April - June 2019. Patients were asked to answer a vaccine survey and information also was obtained from the National Immunization Registry. Descriptive and association statistic were used (χ²; p<0.05).

RESULTS

A total of 243 patients were included (148 ulcerative colitis (UC), 86 Crohn's disease (CD) and 9 non-classifiable IBD). Only six patients (2%) of IBD patients received a complete immunization schedule. The highest vaccine rates were against influenza (67%), hepatitis B virus (40%), 13-valent pneumococcal (34%) and 23-polysaccharide pneumococcal (16%). The influenza vaccine rate has significantly increased, reaching 67% in 2019. The survey showed that 23% of patients have not been immunized with any vaccine, mainly due to lack of time, lack of medical prescription and high cost.

CONCLUSIONS

In this cohort, although vaccination rates are higher than previously reported, adherence to IBD immunization program would be improved, being considered since diagnosis by the multidisciplinary team.

Adherence to Current Vaccination Recommendations for Patients With Rheumatoid Arthritis in Mexico

BACKGROUND

Patients with RA have a two to four-fold increased risk of developing infections compared to the general population. For this reason, the administration of influenza, pneumococcal and shingles vaccines is recommended for all patients with RA, preferably prior to initiating treatment, Previous studies have demonstrated the low prevalence of vaccination as well as adherence to current recommendations by rheumatologists in other regions.

OBJECTIVE

To determine the knowledge and adherence to the current vaccination recommendations for patients with RA by rheumatology members of the Mexican College of Rheumatology (MCR), and to identify barriers to their application in this population.

METHODS

A cross-sectional study was conducted through a survey sent to 577 rheumatologists from Mexico in January 2017.

RESULTS

We received completed surveys from 122 individuals, representing 21.14% of the 577 rheumatologists in our registry. Fifty percent responded that they recommended immunization against influenza to 76%-100% of their patients, 36.07% recommended immunization against pneumococcus to 76%-100% of their patients, and 69.67% of the survey responders did not recommend shingles immunization routinely to their patients.

CONCLUSIONS

The data collected in this study show there is poor adherence to immunization schedules recommended for the RA population. This data suggests there is misinformation about the effectiveness, safety and optimal timing of immunization in patients with RA in Mexico.

[Vaccination counselling: The meeting point is possible]

INTRODUCTION

There are recommendations for decision-making as regards parents who do not vaccinate their children, but there are few publications analysing this problem. In November 2014, a pioneer medical clinic opened in Spain, for counselling on immunisation practices. The aim of this study is to determine the success of the recommendations of the American and Spanish Paediatrics Associations according to the number of parents who finally accept vaccination.

PATIENTS AND METHODS

A descriptive, cross-sectional, prospective and single-centre study was conducted from November 2014 to March 2016. Children under the age of 16 not properly vaccinated, according to the immunisation schedule of the region where the study was conducted, were included after signing informed consent.

RESULTS

A total of 20 families were counselled. The median age of the children was 2 years, and 80% of them received no vaccine. Absolute non-acceptance of vaccination was practiced by 45% of parents. The main reasons for not vaccinating were: 100% thimerosal-containing, 90% risk of autism, 85% aluminium-containing, 70% presence of other stabilisers and preservatives, and 65% risk of anaphylaxis. The immunisation advice was said to be helpful by 90% of parents. Vaccination was accepted by 90% of parents (45% completely).

CONCLUSIONS

Anti-vaccination ideologies are strong and hard to change. Paediatricians not denying medical care to parents who endanger the lives of their own children are also hard to find. The meeting point is possible, and society needs it. Active listening, empathy, and good quality information were the keys to our results.

Hepatitis B virus infection and vaccine-induced immunity in Madrid (Spain)

OBJECTIVE

To estimate the prevalence of hepatitis B virus (HBV) infection and vaccine-induced immunity in the region of Madrid, and to analyze their evolution over time.

METHODS

An observational, analytical, cross-sectional study was carried out in the population aged 16-80 years between 2008 and 2009. This was the last of four seroprevalence surveys in the region of Madrid. The prevalence of HBV infection and vaccine-induced immunity was estimated using multivariate logistic models and were compared with the prevalences in the 1989, 1993 and 1999 surveys.

RESULTS

In the population aged 16-80 years, the prevalence of HBV infection was 11.0% (95% CI: 9.8-12.3) and that of chronic infection was 0.7% (95% CI: 0.5-1.1). The prevalence of vaccine-induced immunity in the population aged 16-20 years was 73.0% (95% CI: 70.0-76.0). Compared with previous surveys, there was a decrease in the prevalence of HBV infection.

CONCLUSIONS

Based on the prevalence of chronic infection (<1%), Madrid is a region with low HBV endemicity. Preventive strategies against HBV should especially target the immigrant population.