The mandate, set to take effect just before Mayor Bill de Blasio leaves office, will apply to workers at about 184,000 businesses. It is likely to face legal challenges.
Researchers in South Africa, where the variant is spreading quickly, say it may cause less serious Covid cases than other forms of the virus, but it is unclear whether that will hold true.
By Lynsey Chutel, Richard Pérez-Peña and Emily Anthes
After eight years in the trenches, Ukrainian soldiers are resigned to the possibility that the Russian military, which dwarfs their own in power and wealth, will come sooner or later.
