[ppf]

Yep, I've seen one or two reports of entire cities being tested. What testing method do they use, that is accurate enough to catch all cases in a very densly populated developing city (and within a week)? Unless Covid isn't as infectious as we have been lead to believe, that doesn't pass the sniff test for me.

[azurezyq]

RT-PCR, it's pretty good but takes time.

They just do batch tests and mix samples in groups, if positive, test again. My father did one a few months ago after returning from Qingdao, where there were a small outbreak then in a hospital.

China is really good at doing things at scale and honestly US is nowhere close (too slow and too inefficient, from what I see here in Santa Clara)

[true_religion]

It’s PCR and you can get it down to a few hours turn around time in a lab, even in the US. China does batch testing with retests for accuracy.

The main difficulty is getting everyone to give a sample but with China’s level of social cohesion and control that is a solved problem.