of how many people who are not getting tested or getting rapid home tests and are not reporting it to public health authorities. we could very well surpass over a million new cases every day. and with those kinds of numbers, we are going to see our police officers, our food service workers, transport, and -- and other critical infrastructure not be able to function. and so, i think the biden administration, through the cdc, did the right thing today in shortening the isolation period. i wish that they made it a bit more nuanced making the distinction between vaccinated versus unvaccinated because the vaccinated probably are carrying the virus for a much shorter period of time compared to the unvaccinated. and i also wish that, in the future, they'd put in testing as a way to return to work because right now, maybe the issue is that there aren't enough rapid tests for us to have testing as a way to -- to figure out if you are still infectious or not. but i think that is something else that could be useful to potentially even shorten the isolation period even more. >> dr. wen, what does this look like, though, in practical