After the recent launch of the Pfizer and Moderna vaccines, some severe COVID-19 vaccine allergic reactions were observed in patients who received them. Allergic reactions are observed with all vaccines, with a rate of around 1 in 1 million. As of 19 December 2020, there have been six reported severe allergic reactions in 272,000 people who have received one of the vaccines.
In the Pfizer clinical trial data, the researchers observed that around 0.63% of the vaccinated group in phase II/III trials experienced a significant allergic reaction.
So does this mean that COVID-19 vaccine allergic reactions are a major concern about the safety of these vaccines? And do we know why we’re seeing them, even if very rarely? I think we can answer both questions in this article. Continue reading “CDC proposes possible cause of COVID-19 vaccine allergic reactions”