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After catching COVID, getting a negative RAT test result appears to be a good indication that you are no longer infectious and that you could come out of isolation, according to US data. The study found that samples from people who had a negative RAT test on day 6 were not able to grow the virus - suggesting they were likely to not be infectious. However, the authors say a negative RAT shouldn't be made a requirement to end isolation, as they also found that only around half of those with a positive RAT on day 6 were likely to still be infectious. They say relying on people having improved symptoms to end iso risks sending infectious people back into the community, and this shows why proper mask wearing and of avoiding high-risk places is really important in the days following isolation.
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