"#COVID Testing.
If you get a negative…
False negatives at the beginning of infection are very common, thanks to the virus mutating. In a recent study, #antigen & #PCR tests only agreed 47-58% of the time. If they did agree, there was a 1-8 day delay between a PCR turning positive & an antigen test turning positive.
The higher we are in a wave, the more skeptical you should be of a negative result. There are 2 things you can do to help reduce false negatives
Swab throat & salvia. These are positive days before the nose.
Repeat testing. 2 tests within 48 hours catch 92% of #symptomatic cases & 39% of #asymptomatic cases. 3 tests 48 hours apart detected 94% of symptomatic & 57% of asymptomatic patients.
If you get a positive…
Positives are positives. You’re infectious.
The faintness of a line provides clues, though:
Very bold line= you’re very contagious.
Barely see the line= you’re at the beginning or the end of your infection window."
https://yourlocalepidemiologist.substack.com/p/riding-the-covid-19-waves-2023-style
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