UK Confirms Adverse Drug Reactions to the Pfizer-BioNTech COVID-19 Vaccine

As of June 9, 2021, the United Kingdom Medicines & Healthcare Regulatory Agency (MHRA) had received 421 Yellow Card reports of suspected adverse drug reactions to the Pfizer-BioNTech COVID-19 vaccine in which the patient died shortly after vaccination.

Additionally, the MHRA confirmed 39 reports of myocarditis and 27 reports of pericarditis following the use of the Pfizer/BioNTech vaccine.

And 376 spontaneous adverse reactions associated with anaphylaxis or anaphylactoid reactions.

The nature and frequency of these reports are in line with that reported in previous updates, says the MHRA.

The UK's Yellow Card scheme is a mechanism by which anybody can voluntarily report any suspected adverse reactions or side effects to the vaccine. It is very important to note that a Yellow Card report does not necessarily mean the vaccine caused that reaction or event.