- EXPLAINER: Allergic reactions to vaccines rare, short-livedThe Associated Press
- Allergy warning for Pfizer/BioNTech vaccine after UK health workers with allergy history suffer reactionCNN
- Coronavirus updates: Canada approves Pfizer vaccine; North Dakota extends mask order into January; Pennsylvania Gov. Tom Wolf tests positiveYahoo News
- Pfizer COVID-19 vaccine entering final phase of review in U.S.CBS News
- Pfizer and BioNTech’s Coronavirus Vaccine Approved in CanadaMotley Fool
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