Frederic J. Brown/ AFP via Getty Images Brenda Vargas, 14, receives her Pfizer Covid-19 vaccine from vocational nurse Eon Walker at a mobile vaccine clinic hosted by Mothers in Action and operated by the Los Angeles County of Public Health, July 16, 2021, in Los Angeles....
The U.S. began vaccinating residents in December, starting with health care workers and the elderly....
The Johnson Johnson vaccine requires only one dose. The seven-day average of new daily first shots administered peaked
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ABC新闻-美国新闻
2021-08-02 00:00:00.0