What is breakthrough COVID and who's most at risk?
https://healthell.blogspot.com/2021/05/what-is-breakthrough-covid-and-whos.html
What is breakthrough COVID and who's most at risk?
Dr. Rochelle Walensky, director of the Centers for Disease Control and Prevention, during a briefing Tuesday defended the agency’s updated approach to monitoring breakthrough coronavirus infections, or COVID-19 occurring after a person is fully vaccinated.
