Side effects following vaccination in multiple sclerosis: a prospective, multi-centre cohort study

Area of Science:

• Neurology
• Immunology
• Public Health

Background:

• Infections pose risks for multiple sclerosis (MS) patients.
• Concerns exist regarding vaccine-induced exacerbation of MS.
• Disease-modifying therapies (DMTs) are common in MS management.

Purpose of the Study:

• To evaluate the safety and impact of standard non-live vaccines on disease activity in MS patients on DMTs.
• To assess changes in relapse rates and disability status post-vaccination.

Main Methods:

• Prospective, multicentre, non-randomized observational study.
• 222 MS patients on DMTs were monitored for disease activity and side effects.
• Vaccines included seasonal influenza and tetanus-based types.

Main Results:

• Annualized relapse rate significantly decreased post-vaccination (0.64 to 0.38).
• Extended Disability Status Scale remained stable within six months.
• 19.2% reported side effects, mostly local or flu-like symptoms.

Conclusions:

• Standard non-live vaccines are safe and well-tolerated in MS patients on DMTs.
• Vaccination does not appear to negatively impact MS disease activity.
• Vaccination may be associated with reduced MS relapse rates.