WASHINGTON: Nearly 4,400 adverse events were reported after people received the Pfizer-BioNTech Covid-19 vaccine in the US, with 21 cases determined to be anaphylaxis, according to a report by the Centers for Disease Control and Prevention (CDC).
He US Food and Drug Administration issued an emergency use authorization for the Pfizer-BioNTech Covid-19 vaccine on December 11, 2020, administered in two separate doses for 21 days, according to Xinhua news agency.
As of December 23, 2020, a total of 1,893,360 first doses of Pfizer-BioNTech COVID-19 vaccine had been administered in the United States, according to the CDC report.
4,393 adverse event reports had been submitted to the country’s vaccine adverse event reporting system.
Among these, 175 case reports were identified for review as possible cases of severe allergic reaction, including anaphylaxis.
Twenty-one cases were determined to be anaphylaxis, including 17 in people with a documented history of allergies or allergic reactions, seven of whom had a history of anaphylaxis, according to the CDC.
Anaphylaxis is a life-threatening allergic reaction that occurs infrequently after vaccination, which usually occurs within minutes to hours, according to the CDC.
Sites where Covid-19 vaccines are administered should adhere to CDC guidelines for the use of spikes, including contraindications and precautionary receptors, have the necessary supplies to manage anaphylaxis, implement the recommended post-vaccination observation periods and treat suspected cases of anaphylaxis immediately. with intramuscular injection of epinephrine, the CDC said.