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Why a group of scientists believe that COVID-19 may not be as infectious once its been 20 minutes in the air
Explained: Why vaccinated people are less likely to spread COVID-19 than the unvaccinated
From patient zero in China to over 255 crore cases worldwide: Timeline of the deadly COVID-19 pandemic
WHO forms new 26-member team, says this may be 'last chance' to find COVID-19 origins
