The implementation took place all the time, but the FDA wanted to stop it and was forced to continue to allow the therapy.  WASHINGTON — Last week, just as the Food and Drug Administration was preparing to issue an emergency authorization for blood plasma as a Covid-19 treatment, a group of top federal health officials including Dr. Francis S. Collins and Dr. Anthony S. Fauci intervened, arguing that emerging data on the treatment was too weak, according to two senior administration officials. The authorization is on hold for now as more data is reviewed, according to H. Clifford Lane, the clinical director at the National Institute of Allergy and Infectious Diseases. An emergency approval could still be issued in the near future, he said.  https://www.nytimes.com/2020/08/19/us/politics/blood-plasma-covid-19.html This therapy saves the lives of one third of the patients, but NIAID wanted to let people die while they "review more data".