Vaccines are here. Still, the pandemic rages on.
As our calendars flipped to 2021, pandemic life didn’t feel particularly different than it had for the past year. Except, by that point, the very first doses of a COVID-19 vaccine had been administered.
Meanwhile, some highly vaccinated communities in the U.S. remained overly cautious, continuing masking even when CDC guidelines said they didn’t need to, while others had resisted masks from the start. “There are people on both ends,” Preeti Malani, chief health officer at the University of Michigan, said in July. “I think both views are a little bit unfortunate for different reasons. We’ve got to bring everyone to the middle.
Variation in a continually evolving virus isn’t surprising, but the impact that SARS-CoV-2’s variants have had is exceptional. The first detected variant , thought to have emerged in September 2020 in the U.K., sounded an initial alarm that grew louder as three more variants popped up worldwide. “I think we didn’t appreciate six months ago that these variants would be the factor that it has become,” Bronwyn MacInnis, genomic epidemiologist at the Broad Institute, said this summer.
By late July, Delta was responsible for over 80 percent of U.S. cases. Researchers confirmed vaccinated people can still transmit the variant, and a new set of CDC guidelines recommended that everyone mask up indoors in high-transmission areas. Then in August, the Pfizer-BioNTech vaccine received full FDA approval, with Biden announcing booster shots would begin in the fall — based on research showing a dip in efficacy for some vaccines after six months.
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