Algorithm enables immunization of most individuals, with 0.7 percent developing anaphylactic reaction after one BNT162b2 dose
Individuals are most infectious in the two days before and three days after symptom onset
Only 20 percent of American adults now say they will not get immunized, the lowest number ever
Retirements come as agency mulls decisions about COVID-19 vaccine approvals, authorizations for younger children, and booster shots.
Agency urges fully vaccinated people to travel with precautions, take infection risk into consideration