One year after FDA authorized Pfizer's COVID vaccine, cases are on the rise

Saturday marks one year since the Food and Drug Administration authorized Pfizer's COVID-19 vaccine — the first of three COVID-19 vaccines now in use in the United States.  

During that time, more than 480 million shots have been administered, and just over 60% of eligible Americans are fully vaccinated. But even with those protections, case numbers have gone up 22% in the past two weeks. 

Confirmed COVID cases showed up this week at an average rate of 120,000 per day, according to the U.S. Centers for Disease Control and Prevention. Ninety-nine percent of those new cases are from Delta variant, not Omicron.