Medium: “Broadly, there are two types of tests, doing two very different things in two different ways. There are others, also, but these are the two you’ll be doing, and hearing a lot about. There’s 1) diagnostic tests (sometimes called “tests”), and 2) serological tests (sometimes called “antibody tests.”) They’re easy to confuse if you’re not in this all day. A friend just got an alert on their phone “free Covid testing at Rite-Aid.” Everyone needs to be able to ask the right questions when they get messages like that. These tests will shape your life in the months and years to come…”