FDA granted Emergency Use Authorization for a blood purification system to treat COVID-19 patients who are at least 18 years old and have been admitted to the intensive care unit with confirmed or imminent respiratory failure, the agency announced Friday (April 10). In its Thursday (April 9) EUA letter , FDA says it believes the removal of pro-inflammatory cytokines from patients’ blood may improve certain severe immune reactions in COVID-19 patients. The authorization is only for the duration of the...