You don’t actually need a massive sample size - 1000 random people would work. Better than destroying the world’s economy first.
Yep. Concentrate on Londaon, other places with international traffic and high density.
Supposedly NYC has a 1:1000 infection rate. Not sure where Birx got that estimate, but it's something she tossed out this afternoon. Big difference between 1:1000 and 1:2