Many people worldwide are experiencing repeat SARS-CoV-2 infections, but the health risks associated with these reinfections have remained unclear. Now,  a team of researchers led by Washington University in St. Louis has found that repeated COVID-19 infections increase the risk of organ failure and death. “During the past few months, there’s been an air of invincibility among people who have had COVID-19 or their vaccinations and boosters, and especially among people who have had an infection and also received vaccines; some people started to referring to these...