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Background and Purpose: We know that treatment algorithms have changed in Multiple Sclerosis (MS) practice during the pandemic. In this study, we aimed to investigate whether there was a change in the patient population for ocrelizumab (OCR) treatment during the pandemic period, the treatment compliance of the patients, and the course of the Coronavirus Disease-19 (COVID-19) disease in the patients who received OCR., Methods: Our study was designed as a survey study. A questionnaire was sent to the patients assessing whether they had COVID-19 infection, whether they received treatments regularly before and after the pandemic, vaccination status and duration of OCR treatment. Demographic characteristics of the patients, treatments they used before, MS type, Expanded Disability Status Scale (EDSS) scores were determined from the database. Each group of OCR started before pandemic and OCR started after pandemic were compared., Results: We included into the study 86 patients who started OCR before pandemic period and 75 patients who started OCR after the pandemic. Demographic features were similar. EDSS scores were higher in the group that started OCR treatment before the pandemic (p<0.0001). The patients who started OCR treatment before the pandemic had more disruptions than which started during the pandemic (p<0.0001). No correlation was found between the duration of OCR treatment and COVID-19 infection (p=0.940). We observed that the patients who had severe COVID-19 infection had received OCR therapy for a longer period., Conclusion: This retrospective study concluded that the OCR treatment approach in our center had changed during the pandemic period. OCR therapy was started in patients with less disability. The possible reasons for this situation include the proven relationship between high EDSS and serious COVID-19 infection, and that the patients who have higher EDSS score had troubles in reaching health institutions during the pandemic. The result that patients with severe COVID-19 infection received OCR treatment for a longer period necessitates more evidence-based research to investigate the relationship between treatment duration and disease severity.

Background: COVID-19 is a multisystemic infection with variables consequences depending on individual and comorbid conditions. The course and outcomes of COVID-19 during neuromyelitis optica spectrum disorders (NMOSD) and myelin oligodendrocyte glycoprotein antibody-associated disorders (MOGAD) are not clearly known., Objective/methods: The aim of this study was to examine the features and outcomes of COVID-19 infection in NMOSD and MOGAD patients. The patients' demographic and clinical factors, disease modifying treatment (DMT) used and disease information of COVID-19 infection were recorded. Conditions leading to hospitalization and severe exposure to COVID-19 infection were also analyzed., Results: The study included 63 patients from 25 centers. Thirty-two patients (50.8%) belong to AQP-4 seropositive group, 13 (20.6%) and 18 (28.6%) were in MOG-positive and double-seronegative groups, respectively. Risk factors for severe COVID-19 infection and hospitalization were advanced age, high disability level and the presence of comorbid disease. Disease severity was found to be high in double-seronegative NMOSD and low in MOGAD patients. No statistically significant effect of DMTs on disease severity and hospitalization was found., Conclusion: In NMOSD and MOGAD patients, advanced age, high disability and presence of comorbid disease pose risks for severe COVID-19 infection. There was no direct significant effect of DMTs for COVID-19 infection., (Copyright © 2021 Elsevier B.V. All rights reserved.)