I talked with my younger son earlier this week. He went to donate plasma and learned that nowadays when someone donates plasma they test for the presence of Covid-19 antibodies. From what I have heard about the swab Covid-19 tests, they are extremely uncomfortable to have done. If you want to learn if you’ve had Covid-19, donating plasma might be a much better way to find out. More than that, if your plasma has the antibodies, it can help save someone who could die without it.
Update 9/4/20: I found info about it at Mayo Clinic, here.
ALSO an important article to read in the L.A. Times from yesterday about the controversy over the treatment, here.