Anti-SARS-CoV-2 vaccination in people with multiple sclerosis: Lessons learnt a year in

Role of Immune Reconstitution Therapy with Cladribine Tablets in the Management of Relapsing Multiple Sclerosis in Older Patients

The pathophysiology and presentation of relapsing multiple sclerosis (RMS) differ importantly between younger and older patients. Older patients usually suffer fewer MS relapses but present with a chronically inflammatory phenotype (inflammaging) associated with accelerated age-related changes to the adaptive and innate immune systems (immunosenescence). The efficacy of most disease-modifying therapies (DMTs) appears to decline with increasing age, likely because of a shift away from focal inflammation as the main driving force for progression of MS. These observations led to suggestions that DMT may be withdrawn for an older person with very stable MS. However, this approach risks the resumption of MS disease activity. In contrast, analyses of evaluations of immune reconstitution therapy with cladribine tablets (CladT) show that this high-efficacy DMT appears to be effective and well tolerated irrespective of age. Achieving long-term freedom from MS disease activity for an older patient with MS is feasible using this approach. Switching to CladT is a rational option for reducing the dual burdens of continuous treatment (including side effects associated with continuous immunosuppression with some DMTs) and monitoring for older people with RMS. This includes possible use as an "exit therapy", beyond which some patients may not need pharmacological therapy for their RMS in the future.

Is there still hesitancy towards SARS-CoV-2 vaccination among people with neurological disease- a survey of the NeuroCOVID-19 task force of the European Academy of Neurology

BACKGROUND

An online 3-item survey was sent to the European Academy of Neurology (EAN) community and inquired about the persistence of SARS-CoV-2 vaccination skepticism and the underlying thoughts and factors restricting vaccine use among patients with neurological conditions.

RESULTS

We obtained 616 responses from 84 countries, predominantly from Europe. In the view of the treating neurologist, patients with multiple sclerosis (MS), neuroimmunological disorders (ND), and chronic neurological infections continued to have high levels of skepticism toward SARS-CoV-2 vaccination. Patients with MS/ND were quoted as the most hesitant group, with 60% of the respondents sharing this impression. The patient group perceived as most confident towards immunization against COVID-19 and with the lowest level of distrust towards the vaccine were those with sleep disorders. For all other conditions, perceived distrust ranged between 42 and 52%. Fear of adverse events of vaccination or disease reactivation was perceived by 87% of patients with MS/ND and more than 70% of patients with stroke/vascular neurology, neuromuscular disorders, chronic neurological infections, and peripheral neuropathy. Patients with sleep disorders (54%), autonomic disorders (46%), movement disorders (43%), and dementia (43%) were sensed as less fearful of vaccine-related adverse events.

CONCLUSION

Despite the large body of evidence proving the efficacy and safety of SARS-CoV-2 vaccination, patients with certain neurological disorders still have a surprisingly high percentage of distrust and fear of adverse events. Our observations emphasize the importance of continuous evidence-based information delivery and patient education by treating neurologists.

Clinical effectiveness of coronavirus disease 2019 vaccination in patients with multiple sclerosis stratified by disease-modifying treatment

BACKGROUND AND PURPOSE

Coronavirus disease 2019 (COVID-19) vaccination has been associated with a dampened humoral and/or cellular immune response in patients with multiple sclerosis (MS) who were concurrently on disease-modifying treatment (DMT) with B-cell depleting agents or sphingosine-1-phosphate receptor modulators (S1PRMs). Our main goal was to investigate the impact of these DMT classes on the clinical effectiveness of COVID-19 vaccination.

METHODS

Since March 2020, demographics and clinical data of patients with MS who developed COVID-19 have been collected at the Belgian National MS Centre in Melsbroek. Patients were considered to be 'protected by vaccination' if they were (i) fully vaccinated and (ii) tested positive for COVID-19 in the period ranging from 14 days to 6 months after the last administered vaccine.

RESULTS

On 19 December 2022, 418 COVID-19 cases were retrospectively identified in 389 individual patients. Hospitalization and mortality rates resulting from the infection were 10.8% and 2.4%, respectively. Being 'unprotected by vaccination' was significantly associated with a worse COVID-19 outcome (i.e., hospitalization and/or death) in the total cohort (N = 418, odds ratio [OR] 3.96), in patients on ongoing DMT other than anti-CD20 agents or S1PRMs (N = 123, OR 31.75) and in patients without DMT (N = 182, OR 5.60), but not in those receiving anti-CD20 agents (N = 91, OR 0.39); the S1PRMs subgroup was considered too small (22 infections) for any meaningful analysis.

CONCLUSIONS

Coronavirus disease 2019 vaccination protects against severe infection in patients with MS but it was not possible to confirm this effect in those on DMT with B-cell depleting agents.

COVID-19 Vaccination and Disease Course in People with Multiple Sclerosis in Greece

Over the past three years, humanity faced the abrupt spread of COVID-19, responsible for a worldwide health crisis. Initially, it was believed that individuals with chronic disorders, including multiple sclerosis, were more likely to be infected and suffer a worse degree of COVID-19 disease. Therefore, data with regard to COVID-19 disease outcomes in these populations may provide additional insight with regard to the management of chronic diseases during viral pandemics. The objective of this study is to evaluate COVID-19 disease course in people with multiple sclerosis (PwMS) during the COVID-19 pandemic in Greece and explore the impact of vaccination in the outcome of SARS-CoV-2 infection in this population. Anonymized data, extracted from nationwide administrative records between February 2020 and December 2021, were retrospectively analyzed in order to identify PwMS with SARS-CoV-2 infection. Demographic data, as well as data regarding COVID-19 infection and vaccination, were additionally collected. The study sample included 2351 PwMS (65.1% females, 51.2% unvaccinated at the time of infection). A total of 260 PwMS were hospitalized, while 25 PwMS died from COVID-19 disease and its complications. Older age, male sex and the presence of comorbidities were independently associated with a higher probability of hospitalization. The risk of hospitalization was decreased in PwMS receiving some disease-modifying treatments. Anti-CD20s demonstrated high odds ratios without reaching statistical significance. Regarding fatal outcome, only age reached statistical significance. Vaccination provided a significant protective effect against hospitalization but did not exhibit a statistically significant effect on mortality.

Summary of Safety and Efficacy of COVID Vaccination in Patients with Multiple Sclerosis

BACKGROUND

The SARS-CoV-2 pandemic represents one of the most challenging issues that have recently influenced everyday life in countries all over the world. Understanding the risk of this disease is of high importance in patients with multiple sclerosis (MS) as they represent a vulnerable population through their treatment with disease-modifying therapies (DMTs). Infective episodes may trigger relapses and lead to deterioration of the health condition.

SUMMARY

Vaccination is an important preventive measure against infectious diseases. In MS patients, concerns have been raised about the effectiveness of vaccines in patients on various immunomodulatory drugs and about their possible adverse effects including impairment of neurological functions. The objectives of this article were to summarize the current knowledge on immune responses to the COVID-19 vaccines and their safety in MS patients and to provide practical guidance based on the data available to date.

KEY MESSAGES

Although MS is not associated with a higher risk of COVID-19, this infection can trigger relapses or pseudo-relapses. Vaccines against SARS-CoV-2 are recommended for all MS patients who are not in the active phase of the disease, despite the fact that there is still a lack of long-term reliable data on the effectiveness and safety of vaccines against COVID-19. Some DMTs can reduce vaccine humoral responses, but might still provide some protection and adequate T-cell response. To optimize the effectiveness of vaccination, the ideal timing of vaccine application and DMTs dosing regimen is crucial.

Safety of SARS-CoV2 vaccination and COVID-19 short-term outcome in pediatric acquired demyelinating disorders of central nervous system: A single center experience

Introduction

Concern of a correlation between disease relapse in patients with acquired demyelinating disorders of central nervous system (CNS) and SARS-CoV2 vaccines has been raised. In this single center study, we retrospectively evaluated safety of SARS-CoV2 vaccination and COVID-19 short-term outcome in pediatric acquired demyelinating disorders of CNS.

Materials and methods

Patients with multiple sclerosis (MS), myelin oligodendrocyte glycoprotein antibody associated disease (MOGAD) and neuromyelitis optica spectrum disorder (NMOSD) with disease onset before 18 years of age were included. Demographic and clinical data, and information regarding previous SARS-CoV-2 infection and vaccination were collected.

Results

We included nine patients with MOGAD. Six patients received SARS-CoV2 vaccination and complained pain at injection site while only one had fever and fatigue. Median follow-up was 28 weeks (range 20-48). Seven patients had COVID-19 occurring with mild flu-like symptoms and median follow-up was 28 weeks (range 24-34). Nobody had disease relapse. Five patients with NMOSD were included. All patients received SARS-CoV2 vaccination (BNT162b2-Pfizer-BioNTech). The median follow-up was 20 weeks (range 14-24) and only two patients complained pain at injection site, fever and fatigue. Three patients had also COVID-19 with mild flu-like symptoms, despite two of them being under immunosuppressive treatment. Lastly, forty-three patients with MS were included. 35 out of 43 received SARS-CoV2 vaccination with a median follow-up of 24 weeks (range 8-36). Fourteen patients had no side effects, while 21 complained mild side effects (mainly pain at injection site) and one experienced a disease relapse with complete recovery after steroid therapy. At vaccination, all but one were under treatment. Sixteen patients had COVID-19 occurring with mild symptoms.

Discussion

COVID-19 outcome was good although many patients were under immunosuppressive treatment. Vaccine-related side effects were frequent but were mild and self-limited. Only one MS patient had a post-vaccination relapse with complete recovery after steroid therapy. In conclusion, our data support the safety of SARS-CoV-2 vaccines in pediatric MS, MOGAD and NMOSD.