I think you need an antibody test for that, which apparently you can buy for $20...

		jrockway on March 28, 2020 \| parent \| context \| favorite \| on: FDA grants emergency use authorization for 5-13 mi... I think you need an antibody test for that, which apparently you can buy for $20 starting on 4/1 (there was an article about it on HN this week).