South Africa's decision to halt its rollout of the Oxford-AstraZeneca vaccine after a study showed "disappointing" results against its new Covid-19 variant may have left the nation in shock, but it also shows how scientists are at the forefront of the battle against coronavirus.
US President Joe Biden promised to rebuild his country's partnership with the African Union (AU) moments after he delivered his first foreign policy speech since taking office.
The US is to end its support for offensive operations by its allies in Yemen, which has been devastated by a six-year war in which more than 110,000 people are believed to have died.
