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- Washington U study shows monthslong immunity after COVID-19 vaccines stltoday.com
- Study suggests Pfizer, Moderna COVID-19 vaccines could provide 'years' of protection Yahoo News
- US Covid-19 response faces doozy of a challenge: Vaccinating kids CNN
- CDC reports 4,115 breakthrough COVID-19 cases involving hospitalizations or deaths Fox News
- Some experts who had Johnson & Johnson's single-dose vaccine are now getting extra shots of Pfizer or Moderna to try to protect against the Delta variant Yahoo News
- View Full Coverage on Google News
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