There are early signs that people who have been vaccinated against Covid-19 may be able to transmit the Delta variant of the virus as easily as those who have not, scientists at Public Health England say.

Philippine President Rodrigo Duterte is warning that Filipinos who refuse to get vaccinated against the coronavirus will not be allowed to leave their homes.

Can vitamin D protect Black women from COVID-19? According to research led by Boston University's Slone Epidemiology Center, the answer may be yes. In a recent study of Black American women, low levels of vitamin D appeared to be related to increased incidence of COVID-19 infection.

Authorities in the Chinese city of Wuhan will begin testing its entire population, after a handful of positive coronavirus cases were detected there.

France is taking the lead in making life unpleasant for the unvaccinated, even requiring some people to get shots. Protesters see a soft dictatorship dawning.