From the New York Times:

Two health care workers at the same hospital in Alaska developed concerning reactions just minutes after receiving Pfizer's coronavirus vaccine this week, including one staff member who was to remain hospitalized until Thursday.

Health officials said that the cases would not disrupt their vaccine rollout plans and that they were sharing the information for the sake of transparency.

The first worker, a middle-aged woman who had no history of allergies, had an anaphylactic reaction that began 10 minutes after receiving the vaccine at Bartlett Regional Hospital in Juneau on Tuesday, a hospital official said. She experienced a rash over her face and torso, shortness of breath and an elevated heart rate.

Dr. Lindy Jones, the hospital's emergency department medical director, said the worker was first given a shot of epinephrine, a standard treatment for severe allergic reactions. Her symptoms subsided but then re-emerged, and she was treated with steroids and an epinephrine drip.