In his acceptance speech, Biden promised to bring unity to the nation.

People in Beijing and other northern Chinese cities are being tested after an increase in the number of COVE in 19 cases in the area.

Russia says it wants to extend the new Start nuclear arms control treaty with the United States and the co vid 19 vaccine by Pfizer and beyond.

Tech is likely to protect against a new version of the coronavirus that has spread from Britain, research suggests.