1. Primary vaccinations and boosters effective in reducing COVID-19 severity during Delta and Omicron predominance  News-Medical.Net
  2. COVID-19 vaccines protect against severe outcomes but less so over time  CIDRAP
  3. 'Breakthrough' Infections After COVID Vaccine Can Help Prevent Future Illness  U.S. News & World Report
  4. Study examines the incidence of severe COVID-19 in fully vaccinated and boosted high-risk populations  News-Medical.Net
  5. Vaccines, Booster Shots and Prior Infections Reduce Risk and Severity of Future COVID-19 Infections, Study Finds  The Weather Channel
  6. View Full coverage on Google News

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