9. Phản ứng sau tiêm và hiệu quả của tiêm vắc xin Comirnaty phòng Covid-19 ở trẻ em từ 12 - 17 tuổi tại Bệnh viện E

Abstract

This is a cross-sectional descriptive study to describe post-injection reactions and assessment of effectiveness after 3 months of COVID-19 COMIRNATY vaccination in children at the age of 12 - 17 years old at E-Hospital. The cross-sectional descriptive study was carried out on 282 children from 12 to 17 years old , who were vaccinated against COVID-19 COMIRNATY at E-Hospital from October 2021 to April 2022. The rate of post-injected reactions after the 1st and 2nd injection was 77% and 65.6% respectively; the most common reactions were swelling and pain at the injected site, body aches, headache, accounting for 60.3%; 61% and 29.1% respectively after the 1st dose and 50.2%; 46.5% and 27.2% respectively after the 2nd dose. 100% of children who received two full doses of the vaccination did not need hospitalization and recovered to normal after contracting COVID-19. Most of the post-injected reactions with COVID-19 COMIRNATY vaccine were mild, and occurred within the first 3 days after injection. The rate of hospitalization, occurrence of severe symptoms, and mortality were markedly low in the group of children who received 2 doses of COVID-19 COMIRNATY vaccine when they contracted COVID-19 within 3 months of vaccination.