MOG and COVID-19: Of the 43 preliminary articles, 20 were excluded, because they described a different condition (ADEM/ON/myelitis/peripheral neuropathy), 5 because they were not a case studies (review/cross-sectional study), 3 because complete case data were not available, 2 because COVID-19 was combined with another infection, 2 because no anti-MOG antibodies were detected, 1 because the MOGAD diagnosis was made before the COVID-19 infection, 1 because COVID-19 infection was unlikely, and 1 because the patient also had positive anti-NMDAR antibodies.