Prognosis

California Crisis Deepens; U.S. Allergic Reaction: Virus Update

A technician prepares a Pfizer-BioNTech Covid-19 vaccine at a UHN vaccination clinic in Toronto, Ontario, Canada, on Dec. 15. 

Photographer: Cole Burston/Bloomberg
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New cases in California shattered another record as a deepening crisis threatens a shortage of intensive-care beds and medical staff. The most-populous U.S. state is struggling to control its outbreak even as most residents are under stay-at-home orders.

The first hiccups in the distribution of a Covid-19 vaccine in the U.S. included a holdup in delivering 3,900 shots to two states and the announcement that Pfizer Inc. would ship about 900,000 fewer doses next week than are set to ship this week. A health-care worker in Alaska who received the shot experienced the first known severe allergic event in the U.S.