To Vaccinate, or Not, in Patients With MS

By contrast, Kappos et al, in a 2015 study, found that patients receiving fingolimod had lower response rates to influenza and tetanus booster vaccines than patients who took a placebo.⁶ Similarly, in a 2014 study, Olberg et al examined patients receiving interferon ß, glatiramer acetate, natalizumab, and mitoxantrone after receiving influenza and H1N1 vaccinations. The researchers found that those treated with any therapy other than interferon ß had a reduced rate of response and should therefore be considered for vaccine response analysis.⁷ Bar-Or et al also published data on response rates of patients treated with teriflunomide (7 mg or 14 mg) or interferon ß; rates were reduced with 14-mg teriflunomide compared to the other treatments—but most patients exhibited seroprotection regardless.⁸ Studying vaccine efficacy in 2013, McCarthy et al evaluated serum antibodies against common viruses before and after treatment with alemtuzumab and found that antibodies remained detectable six months post-alemtuzumab.⁹

In summary, most specialists agree that vaccines are helpful for patients with MS. However, due to the varied response rates among disease-modifying therapies and the correlation between infection and increased relapse rates, special care should be taken when treating this population. Generally, inactivated vaccines are safe, but seroprotection should be established to determine if a booster is necessary. Attenuated vaccines are generally safe for patients who are not immunosuppressed and can reduce the risk for infection if given prior to immunosuppression. After immunosuppression, attenuated vaccines should not be given until immune recovery has been established. —PP

Patricia Pagnotta, ARNP, MSN, CNRN, MSCN
Neurology Associates, PA
MS Center of Greater Orlando