Kim brunhuber, this is cnn newsroom. We are now just hours away from the start of the Republican National convention. Ahead of that, u. S. President donald trump is touting what he calls a powerful therapy to treat covid19 patients. Hes talking about convalescent plasma. Its been given as an emergency use authorization by the fda though many question whether theres enough data to support its use. The fda has issued an emergency use authorization. Thats such a powerful term, emergency use authorization for a treatment known as convalescent plasma. This is a powerful therapy that transfusions very, very strong antibodies from the blood of recovered patients to help treat patients battling a current infection. Several medical experts believe the fdas decision was made under pressure from the white house. The head of that Agency Denies it and defends the move saying all decisions are based solely on data. We know were going to continue to collect data. We do that for all of our emergency u