Covid 's: Covid positive contact requires quarantine for all concerned for at least 10 days and testing may be negative for any or all, but one positive for period cited will usually result in all susceptible having the virus.
Answered 12/30/2020
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COVID 19 testing: COVID 19 testing is more likely to be accurate for testing positive, if one waits 5 to 8 days after COVID 19 exposure or is symptomatic.
Answered 1/1/2021
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