Query Response

Responder: Hansen (Covid-19 Expert)

So far these seem to be extremely rare —in China they seem to account for less than 0.2% of all infections. Other literature shows that scientists have observed persistent infections of coronaviruses in animals. We still don’t know enough about the virus or about how immunity develops after infection to say much about how this might work. Thus far it seems rare enough not to be alarmed about. And most scientists seem to think errors more likely explain why some recovered patients are testing positive.