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Hahn said such a treatment is promising as a therapy for COVID-19 patients and a potential preventative treatment for others who haven't been infected yet on "Mornings with Maria."
"I'm very optimistic about the convalescent plasma," Hahn said. "Convalescent plasma is where you take plasma -- the liquid, protein part of the blood that contains natural immunity that people have developed when they've been exposed to COVID-19 -- you process it, and you give it to someone who's sick."
When a body gets infected with a virus like COVID-19, it starts producing antibodies that fight a specific germ. These antibodies can be found in the blood of COVID-19 survivors for months or even years after they catch the virus.
The FDA commissioner explained that "there are some good preliminary data to suggest that it is a benefit," and Red Cross and Mayo Clinic developers are scaling up their plasma treatments in anticipation of higher demand for the treatment that could help contain COVID-19.
Convalescent plasma can also be used to produce "hyperimmune globulin," Hahn said, "which is a shot of concentrated antibodies that can also provide a treatment, and could also potentially be used as a prophylactic for those who haven't been exposed to the virus."
Hahn is also optimistic about COVID-19 testing, saying that the U.S. has ramped up its testing from just "tens of thousands" about two months ago to "5.5 million" this week. He added that there are more than 390 test developers actively working with the FDA to produce and distribute tests.
The FDA is still conducting trials for other potential COVID-19 treatment drugs such as Gilead's remdesivir antiviral drug and an immunosuppressive drug touted by President Trump called hydroxychloroquine.
The administration is looking at whether these drugs help patients already diagnosed with COVID-19 and whether they can prevent medical professionals and first responders from catching the virus when they come in contact with infected people.