iecently spoke with propublica health reporter caroline chen,nt who delved ithe data to find out more. car toline, let's staking about how do we figure out who especially if there is this possibility that we are now flatting the curve. how do i know if i'm somebody who's already had it, and if i'm asymptomatic? >> so, i think that there are twnco ts here. a true asymptomatic person is w somebo never had symptoms at all. arend t another word that i'll introduce, which is "pre-symptomatic," which is se omebody who at the tey were tested and was positive, didn't yet have symptoms but then maybe later on had a cough or fever. so, we now know that there are bo types of people, more commonly maybe that there are pre-symptomatics. and is think ially important that we be testing pheople, you know, w diagnostic tests so we can find these people out there because people can start transmitting the disease before their symptoms turn up. to your other question, which is, can i find out if i had been that requires a different type of test. that's an antibody test that's done with the blood. >> sree