re: Covid-19 PCR test for travel

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PCR takes 2-3 days for lab analysis usually.

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Yeah, 4 hour results is almost certainly an antigen test which is useless for travel.

In 2 weeks I head for Kenya and need a 96 hour result - ie 3 days before boarding. I may have gone a little overboard but there is a lot on the line. I've got 3 home test kits coming - Picture, Pixel, and Vault. And I'll do a couple of tests locally, probably CVS in 2 different cities - they seem to have their act together for getting the results in 2-3 days.

Friends of mine went up to Alaska a few weeks ago and never got their PCR test result. So they had to take one in Fairbanks and lost around 5 days.

This is a pretty good article on the current state of test at home kits:

Test at home kits