Vaccine Refusal May Put Herd Immunity At Risk, Researchers Warn
Toronto Suspends In-Person Classes As Cases Surge In Canada's Most-Populous Province
How Herd Immunity Works — And What Stands In Its Way
Biden Says All Adults Will Be Vaccine Eligible By April 19
Governor Aims To Reopen California By Mid-June, Contingent On Public Health Metrics
European Court Backs Mandatory Vaccinations For Children
World's Biggest Vaccine Maker 'Very Stressed' As India Sees Record Spike In COVID-19
Brazil Tops 4,000 Daily COVID-19 Deaths, Nears U.S. Peak
A man died after being forced to do 300 squats for breaking curfew in the Philippines.
Jerusalem's Old City Comes Alive With Religious Festivals As Vaccination Rate Rises