To help combat the outbreak, AdventHealth has begun an experimental COVID-19 therapy that uses plasma from recovering people to help patients who are critically ill, joining a small cadre of hospitals in the nation that have taken the lead in adding the treatment to their arsenal. Called convalescent plasma, the therapy can potentially lessen the severity of COVID-19 infection and shorten its duration. The therapy has been approved by the Food and Drug Administration for emergency use in severely ill patients.