Britain's Queen Elizabeth catches Covid-19

Queen Elizabeth tested positive for Covid-19 on Sunday, sharpening concerns about the health of the world's longest-reigning monarch two weeks after she marked 70 years on the British throne.

The 95-year-old queen, who has been fully vaccinated against coronavirus, quipped just four days ago to palace staff that she could not move much, and she spent a night in the hospital last October for an unspecified ailment...