SARS-CoV-2 serology after COVID-19 in multiple sclerosis: An international cohort study

Maria Pia Sormani, Irene Schiavetti, Doriana Landi, Luca Carmisciano, Nicola De Rossi, Cinzia Cordioli, Lucia Moiola, Marta Radaelli, Paolo Immovilli, Marco Capobianco, Vincenzo Brescia Morra, Maria Trojano, Gioacchino Tedeschi, Giancarlo Comi, Mario Alberto Battaglia, Francesco Patti, Yara Dadalti Fragoso, Sedat Sen, Aksel Siva, Roberto FurlanMarco Salvetti

Research output: Contribution to journalArticlepeer-review


Background: The MuSC-19 project is an Italian cohort study open to international partners that collects data on multiple sclerosis (MS) patients with COVID-19. During the second wave of the pandemic, serological tests became routinely available. Objective: To evaluate the seroprevalence of anti-SARS-CoV-2 antibodies according to the use of disease-modifying therapy (DMT) in a subset of patients included in the MuSC-19 data set who had undergone a serological test. Methods: We evaluated the association between positive serological test results and time elapsed since infection onset, age, sex, Expanded Disability Status Scale score, comorbidities and DMT exposure using a multivariable logistic model. Results: Data were collected from 423 patients (345 from Italy, 61 from Turkey and 17 from Brazil) with a serological test performed during follow-up. Overall, 325 out of 423 tested patients (76.8%) had a positive serological test. At multivariate analysis, therapy with anti-CD20 was significantly associated with a reduced probability of developing antibodies after COVID-19 (odds ratio (OR) = 0.20, p = 0.002). Conclusion: Patients with MS maintain the capacity to develop humoral immune response against SARS-COV-2, although to a lesser extent when treated with anti-CD20 drugs. Overall, our results are reassuring with respect to the possibility to achieve sufficient immunization with vaccination.

Original languageEnglish
JournalMultiple Sclerosis Journal
Publication statusAccepted/In press - 2021


  • coronavirus
  • immunomodulatory therapies
  • immunosuppressive therapies
  • Multiple sclerosis
  • Sars-COV-2

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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