Convalescent plasma not helpful in China study; hydroxychloroquine doesn't prevent infection

Infusions of antibody-rich blood plasma from people who have recovered from the coronavirus, so-called convalescent plasma, failed to make a difference in a study of hospitalized patients in China, researchers reported on Wednesday in the Journal of the American Medical Association.In a randomized trial involving 103 COVID-19 patients, convalescent plasma made no difference in the time it took to show signs of improvement or in rates of death at 28 days versus a placebo.There were some potential