With COVID-19 infections becoming more common, experts have recently urged doctors to prescribe the antiviral drug Paxlovid more than they have been to minimize patients’ symptoms and reduce the chance that they’ll develop severe disease. The drug is authorized for people at higher risk of developing severe COVID-19, including those who are older and people with underlying health conditions. But many patients who have taken Paxlovid have reported developing rebound infections shortly after: testing positive again for the virus after first supposedly clearing the infection and testing negative. Studies have documented that the repeat positive tests are due to the same virus that caused the original infection returning again, rather than a new infection. In 2022, the U.S. Cent…