As far as I'm aware tests for viruses look for your bodies immune response to specific viruses. Therefore it is possible to be asymptomatic but still contagious and not test positive. Which is why people who may have been exposed are effectively asked to quarantine themselves.
But IANAD so could be wrong and it's been years since I studied this stuff.
As far as I'm aware tests for viruses look for your bodies immune response to specific viruses. Therefore it is possible to be asymptomatic but still contagious and not test positive. Which is why people who may have been exposed are effectively asked to quarantine themselves.
But IANAD so could be wrong and it's been years since I studied this stuff.