The push comes as the coronavirus's more contagious delta variant drives a fourth surge of covid-19 cases in the United States.
By Amy B Wang
Mutations ramp up transmissibility and raise new challenges for ending the pandemic.
Survey also shows that many Americans expect to spend more time outdoors post-pandemic
By Amy Goldstein and Emily Guskin
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.
Amid concern that the delta variant could upend fragile progress, the incentives, many geared toward young people, keep coming.
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The variant first identified in India last year is now dominant in the United States.
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