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Questions remain about the extent to which vaccinated people who become infected with the delta variant can spread the coronavirus. (Joel Carrett/EPA-EFE/Shutterstock)
As the delta variant surges, the significance of breakthrough infections remains unclear.
Officials in Washington-area jurisdictions are watching community spread and could revisit pandemic restrictions.
While company data showed a slight drop in efficacy against any symptomatic cases of covid-19, from 96 percent protection in the first two months following vaccination to 84 percent after four months, the vaccine was 97 percent effective against severe disease.
The Washington Post is providing our daily live updates, comprehensive guide to the pandemic and our Coronavirus Updates newsletter for free, so that all readers have access to this important information about the coronavirus pandemic.
The variant first identified in India last year is now dominant in the United States.
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