* diagnosis of asymptomatic covid-19, mild covid-19, or critical covid-19 * in the opinion of the investigator, is not likely to survive for \>48 hours beyond day 1 * new onset stroke or seizure disorder during hospitalization and prior to day 1 * history of relevant cns pathology or current relevant cns pathology

* diagnosis of asymptomatic covid-19, mild covid-19, or critical covid-19 * in the opinion of the investigator, is not likely to survive for \>48 hours beyond day 1 * new onset stroke or seizure disorder during hospitalization and prior to day 1 * history of relevant cns pathology or current relevant cns pathology

- diagnosis of asymptomatic covid-19, mild covid-19, or critical covid-19 - in the opinion of the investigator, is not likely to survive for >48 hours beyond day 1 - new onset stroke or seizure disorder during hospitalization and prior to day 1 - history of relevant cns pathology or current relevant cns pathology

- diagnosis of asymptomatic covid-19, mild covid-19, or critical covid-19 - in the opinion of the investigator, is not likely to survive for >48 hours beyond day 1 - new onset stroke or seizure disorder during hospitalization and prior to day 1 - history of relevant cns pathology or current relevant cns pathology