[redpoint5]

False negatives are extremely common. My worthless anecdote is that I've had at least 1 false-negative, which was determined by doing another identical test at the identical location 2 days later and getting a positive result. This was for a PCR test, which is considered even more accurate than the rapid tests.

I had researched false negatives quite some time ago and forgot the exact figures, but one has to time the test within a couple days of the optimal testing period after being exposed to the virus to get a decently high chance of reading a valid positive result. Too soon or too late and and the accuracy falls off a cliff.

Kinda makes you wonder why some places are so militant about allowing normal freedom with "proof" of a negative covid test when those tests are so lousy. Heck, a person exposed to covid wouldn't even get a positive result until 5 days after exposure. That means a person with a negative result from a test 72hrs prior could easily have covid and not yet present any evidence of infection.