Montserrat Parello lost her husband eight years ago, and Christmas gatherings with children and grandchildren had helped her deal with her loneliness. But this year, the 83-year-old will be alone for the holiday at her home in Barcelona, due to the risk of infection from the coronavirus.

Millions of people must cancel their Christmas get-togethers and most shops have to close in London and much of southern England, British Prime Minister Boris Johnson said Saturday as he imposed a new, stricter level of coronavirus restrictions on the region to curb rapidly spreading infections.