“The Mass. General study took samples from 200 residents on the street...”
Well there’s a scientific sampling if ever there was one.
It's small, but it is probably less systemically biased than many of the tests that have been reported. These are asymptomatic volunteers.
Random sampling is perfectly valid science. The trick is to be sure that it really IS random. And the tested population size has to be large enough to yield valid statistics.
Maybe they sampled one guy 50 times because he just kept walking past.
This probably can’t even properly identify actual past infections.
They need an actual government study.
(I know, usually i wouldn’t say that, but now for this, i do)