A man wears a face mask while walking in an empty street in the financial district, known as The City, in London, Monday, December 13, 2021. While many people will re-start working from home, the British government raised the country's official coronavirus threat level on Sunday, warning the rapid spread of omicron “adds additional and rapidly increasing risk to the public and health care services” at a time when COVID-19 is already widespread. (Photo by Alberto Pezzali/AP Photo)
|