The curious case of the Covid-19 rebound

If we've learned anything over the past two and a half years, it's that Covid-19 is one strange disease. The latest case in point: the coronavirus rebound. The condition grabbed international attention last week when US President Joe Biden tested positive for the virus six days after testing negative following his first bout of the illness. The White House said Biden, who is back in isolation, was experiencing a bit of a 'loose cough' but did not have a fever and his lungs were 'clear.' The President tested positive again after being treated with the antiviral Paxlovid. White House officials had previously suggested a rebound case of Covid was unlikely, based on reports of cases around the country, but Biden's doctors continued to monitor his health and test him.