I heard initially that they needed multiple tests per person.
Initially, tests were reportedly done in pairs to reduce false results. Many throat tests early in the disease cycle were negative even with symptoms. A few days later they were retested, and were positive. Then when symptoms abey for a few days, they retest to clear.
147 posted on 03/26/2020 6:14:57 PM PDT by lepton
("It is useless to attempt to reason a man out of a thing he was never reasoned into"--Jonathan Swift)