multiple sclerosis(41) COVID-19(34) SARS-CoV-2(27) Patient(24) Multiple(19) vaccination(16) IgG(14) Immunoglobulin(14) anti-CD20(14) Immunoglobulin G(14) management(14) antibodies(13) CD20(12) vaccination.(12) Treatment(11) pandemic(11) Ocrelizumab(11) humoral(11) detectable(10) Odds ratio(10) 95% confidence interval(10) reported(10) SARS-CoV-2 vaccination(9) therapy(9) Humoral response(8) dose(8) B-cell(8) individuals(8) Efficacy(8) 95% CI(7)