In a new round of tests, the drug company wants to see if booster doses of its vaccine will ramp up defenses against emerging strains of the coronavirus.
The variant in Brazil is causing a surge in Manaus, a city where the virus previously infected huge numbers in the spring of 2020. Researchers are trying to determine why.
The drugs only need to be taken a few times a year — and may soon be available in many parts of the world. Patients say they are more convenient and less stigmatizing.
The pandemic pushed many South Africans out of work. Some grabbed land and put up shacks. There's a community called "Covid" — and even "Sanitizer." The Anti-Land Invasion Unit aims to tear them down.
They interpret for South African President Cyril Ramaphosa in his coronavirus briefings. Their expressive signing has made them celebrities — and brought attention to South African Sign Language.
The circus was founded to lift kids out of poverty and change racial attitudes. It's become a world-famous institution — performing for Barack Obama, for example — while holding true to its dream.
Esther Ngumbi, a professor from Kenya, and Ifeanyi Nsofor, a doctor in Nigeria, react to the megastar's movie-length music video — and to criticism from other Africans.