Trump declared that transplant would help "save countless lives". Unsplash
That announcement came a day after Trump, on Twitter, declared that "The deep state, or whoever, over at the FDA is making it very difficult for drug companies to get people in order to test the vaccines and therapeutics."
In his tweet he said: "Obviously, they are hoping to delay the answer until after November 3rd. Must focus on speed, and saving lives!"
Trump was referring to the date of the presidential election in which he faces former Vice President Joe Biden, the Democratic Party nominee.
The commissioner of the FDA, Dr. Stephen Hahn, told reporters that the agency had determined that the blood plasma treatment was worth granting the emergency authorization following an analysis of 20,000 of the 70,000 patients who had received the treatment, as well as based on other studies.
A "35% improvement in survival is a pretty substantial clinical benefit," he added. "We've seen a great deal of demand for this from doctors around the country."
Plasma treatment has been used safely against other diseases, including Ebola and diphtheria, but scientists — including some who work for the U.S. government — are more cautious about it as a treatment for the coronavirus, saying the results are mixed and there is no proof yet that it works against COVID-19.