Abstract
The study aims to show the efficacy/effectiveness and safety of vaccinations in patients with multiple sclerosis. This systematic review was conducted following the guidelines of the Cochrane Collaboration and the meta-analysis of observational studies in epidemiology (MOOSE). At the end of the review process, 133 studies were included; the bibliographic search was conducted on PubMed/Medline and Scopus, combining free text and words. In general, vaccinations do not seem to aggravate multiple sclerosis (MS) or increase the probability of relapse, particularly for inactivated vaccines and, in general, for the rest of the vaccines. However, it is advisable, especially for vaccines with a live attenuated virus, to carefully evaluate the risks and benefits of these vaccinations; as regards the effectiveness in relation to the drug taken, there is great variability in response. In particular, vaccinations are less effective in patients undergoing therapy with anti-CD20 and S1P modulators. At the same time, a small response is likely to be better than none. Whenever possible, vaccinations should be offered and recommended to patients with multiple sclerosis.
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