4,400 adverse events reported in the United States after receiving Pfizer-BioNTech vaccine

WASHINGTON: Nearly 4,400 adverse events have been reported after people received Pfizer-BioNTech Covid-19 vaccine in the United States, including 21 case determined to be anaphylaxis, according to a report by Centers for Disaster Control and Prevention (CDC).
the 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 of 21 days, the Xinhua news agency reports.
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.
Reports of 4,393 adverse events had been submitted to the country’s vaccine adverse event reporting system.
Of these, 175 case reports were identified for further investigation as possible cases of severe allergic reaction, including anaphylaxis.
Twenty-one cases were found to be anaphylactic, 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 rarely occurs after vaccination, usually starting within minutes to hours, the CDC said.
Sites administering Covid-19 vaccines should adhere to CDC guidelines for vaccine use, including screening recipients for contraindications and precautions, have supplies to manage anaphylaxis, implement recommended post-vaccination observation periods and immediately treat suspected cases of anaphylaxis. with intramuscular injection of epinephrine, the CDC said.