8 days!

“COVID patients exhale high numbers of virus during the first eight days after symptoms start, as high as 1,000 copies per minute, reports a new Northwestern Medicine study.”

#covid #health 

https://news.northwestern.edu/stories/2023/09/covid-patients-exhale-up-to-1000-copies-of-virus-per-minute-during-first-eight-days-of-symptoms/