A recent study from Johns Hopkins researchers, for instance, found people were far more likely to get a false negative test early on in their infection. That means a negative test result could mislead you even further if you're actually carrying the virus without any tell-tale signs. That means even people who test negative need to protect themselves and others. "Regardless of what the test result shows," he said, "you should behave in a way that's reasonable." Both Kunitskaya and Sanderson say getting tested didn't change their behaviour, beyond finally seeing close family and friends.
Source: CBC News July 30, 2020 09:00 UTC