To prevent medically significant COVID-19 illness and death, persons must understand their risk, take steps to protect themselves and others with vaccines, therapeutics, and nonpharmaceutical interventions when needed, receive testing and wear masks when exposed, receive testing if symptomatic, and isolate for ≥5 days if infected.
http://archive.today/2022.08.12-074019/https://www.cdc.gov/mmwr/volumes/71/wr/mm7133e1.htm