Omicron BA.5 SARS-CoV-2 challenge virus clinical trials

COVID-19 Omicron BA.5 Subvariant Dose Finding Infection Study

Researchers are studying how much of the Omicron BA.5 virus causes infection in people who've had COVID-19 vaccines or infections before. This helps them understand the virus better and test treatments more safely, helping to protect people from getting very sick from future COVID-19 variants.