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. 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. [After treatment] her symptoms subsided but then re-emerged, and she was treated with steroids and an epinephrine drip. When doctors tried to stop the drip, her symptoms re-emerged yet again, so the woman was moved to the intensive care unit. The second worker received his shot on Wednesday and developed eye puffiness, lightheadedness and a scratchy throat 10 minutes after the injection. He was taken to the emergency room and treated. The worker was back to normal within an hour and released. The hospital ... administered 144 total doses. The Alaska woman's reaction was believed to be similar to the anaphylactic reactions two health workers in Britain experienced after receiving the Pfizer-BioNTech vaccine last week. Like her, both recovered. Pfizer's trial did not find any serious adverse events caused by the vaccine, although many participants did experience aches, fevers and other side effects. [The CDC] has recommended that the vaccine be administered in settings that have supplies, including oxygen and epinephrine, to manage anaphylactic reactions.