LA CROSSE, Wis. (AP) — La Crosse County health officials say a resident has been reinfected with COVID-19, though scientists studying the virus have yet to confirm a case of reinfection, and not a flare-up of a previous infection. The county Health Department, in a Facebook post Tuesday, said the person first tested positive for COVID-19 more than three months ago. The Centers for Disease Control and Prevention last month said there had been no confirmed cases of COVID-19 reinfection, but scientists continue to investigate the possibility.