24. The prevalence of common adverse events after the 3rd dose of Comirnaty (Pfizer) COVID-19 vaccine among people vaccinated at the Vaccination site of Hanoi Medical University, 2022
Main Article Content
Abstract
A cross-sectional descriptive study was conducted to determine common adverse events after the 3rd dose of the COVID-19 vaccine among people vaccinated at the Hanoi Medical University vaccination site in 2022. The study was conducted on 721 research subjects from January 2022 to October 2023. The study results showed that the reaction rate after the 3rd injection was 60.9%, in which the reaction rate after the additional dose was 57.8% and after the booster dose was 64.0%, however, this difference is not statistically significant (p > 0.05). The most common post-injection reactions were injection site reactions (45.8%), fatigue (24.3%), fever (16.2%), and increased pain sensation (15.3%). After the additional dose injection, local reactions was 43.6%, fatigue was 20.8% fever was 14.2%, and increased pain was 13.3%. After the booster dose, local reactions also accounted for the highest rate (47.9%), followed by fatigue (27.7%), fever (18.3%), and increased pain sensation (17.2%). Post-injection reactions mainly appear within 1 to 24 hours and usually resolve within 24 hours. The rate of reactions after the 3rd dose of the Comirnaty vaccine (Pfizer) is common, but most reactions are mild to moderate and usually resolve on their own within 24 hours.
Article Details
Keywords
Common adverse events, Comirnaty COVID-19 vaccine, Pfizer, immunization
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