2 UK Health Workers Suffer Allergic Reaction to COVID-19 Vaccine.<br />After the U.K.'s first day of mass <br />coronavirus vaccinations on Dec. 8, .<br />National Health Service (NHS) England says two health care workers have "responded adversely.".<br />The workers both reportedly have a history of <br />allergic reactions and carry adrenaline autoinjectors.<br />According to Stephen Powis, national medical director for NHS England, "both are recovering well.".<br />U.K. health authorities are advising anyone with <br />a "significant history of allergic reactions" to <br />refrain from getting the Pfizer-BioNTech vaccine.<br />The Medicines and Healthcare products Regulatory Agency (MHRA) added that vaccines "should only be carried out in facilities where resuscitation measures are available." .<br />Dr. Paul Offit, a vaccine expert, told CNN that "in the United States, roughly one of every 1.4 million doses of vaccines is complicated by a severe allergic reaction."