"The studies’ general findings indicate an occurrence of neuromyelitis optica (NMO) in healthy individuals within around two weeks after Pfizer, Moderna, and AstraZeneca vaccines. In patients already affected by the disease or a similar neurological autoimmune disease such as multiple sclerosis, an exacerbation of symptoms or relapse was observed.

So far, at least six cases of NMO occurring after COVID-19 vaccination have been reported in case studies around the world. Though some individuals made a full recovery, some were discharged with long-term medications or unresolved symptoms.

Neuromyelitis optica is a rare autoimmune disease in which the immune system mistakenly attacks the spinal cord and the nerves in the eyes. Though there is no cure, treatment can prevent future relapses that will do further damage to nerves."