Manganotti et al. [33] RT-PCR NA Negative anti-ganglioside antibodies, negative HIV, HBV, HCV negative serological tests for autoimmune disordes Increased total protein (72 mg/dL), leucocytes: 5 cell/mm3, negative SARS-CoV-2 PCR Mainly demyelinating Predominantly AIDP Brain: no pathological findings IVIG 400 mg/kg/day (5 days) Hydroxychloroquine, lopinavir/ritonavir, methylprednisolone Improvement