There's this period called the incubation period ... If you get exposed today, there's almost no point in going and getting a test tomorrow ... You'll be negative even if you're positive ... The best window... is probably around a five-day period, maybe a six-day period if you want to be conservative.

The [COVID-19] test cadence matters more than the sensitivity of a pure test. The more we test, the more often we test, the better these tests will perform and the more likely we are to pick out positives and reduce the spread in the community.

This is going to be something that, as you go into October [2020], you will start to see more and more saliva testing [for COVID-19] and a move away from swabs, particularly nasopharyngeal swabs.

We're [America] now doing upwards of... between 700K and 900K [COVID-19] tests a day, most of those being PCR-based tests.