Epidemiology of Acute Myocarditis/Pericarditis in Hong Kong Adolescents Following Comirnaty Vaccination.
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Chua Gilbert T, Kwan Mike Yat Wah, Chui Celine S L, Smith Robert David, Cheung Edmund Chi Lok, Ma Tian, Leung Miriam T Y, Tsao Sabrina Siu Ling, Kan Elaine, Ng Wing Kei Carol, Chan Victor Chi Man, Tai Shuk Mui, Yu Tak Ching, Lee Kwok Piu, Wong Joshua Sung Chih, Lin Ying Kit, Shek Chi Chiu, Leung Agnes Sze Yin, Chow Chit Kwong, Li Ka Wah, Ma Johnny, Fung Wai Yuk, Lee Daniel, Ng Ming Yen, Wong Wilfred Hing Sang, Tsang Hing Wai, Kwok Janette, Leung Daniel, Chung Kin Lai, Chow Chun Bong, Chan Godfrey Chi Fung, Leung Wing Hang, To Kelvin Kai Wang, Yuen Kwok Yung, Lau Yu Lung, Wong Ian Chi Kei, Ip Patrick
Аннотация
METHODS: This is a population cohort study in Hong Kong that monitored adverse events following immunization through a pharmacovigilance system for coronavirus disease 2019 (COVID-19) vaccines. All adolescents aged between 12 and 17 years following Comirnaty vaccination were monitored under the COVID-19 vaccine adverse event response and evaluation program. The clinical characteristics and overall incidence of acute myocarditis/pericarditis in adolescents following Comirnaty vaccination were analyzed.
RESULTS: Between 14 June 2021 and 4 September 2021, 33 Chinese adolescents who developed acute myocarditis/pericarditis following Comirnaty vaccination were identified. In total, 29 (87.88%) were male and 4 (12.12%) were female, with a median age of 15.25 years. And 27 (81.82%) and 6 (18.18%) cases developed acute myocarditis/pericarditis after receiving the second and first dose, respectively. All cases are mild and required only conservative management. The overall incidence of acute myocarditis/pericarditis was 18.52 (95% confidence interval [CI], 11.67-29.01) per 100 000 persons vaccinated. The incidence after the first and second doses were 3.37 (95% CI, 1.12-9.51) and 21.22 (95% CI, 13.78-32.28 per 100 000 persons vaccinated, respectively. Among male adolescents, the incidence after the first and second doses were 5.57 (95% CI, 2.38-12.53) and 37.32 (95% CI, 26.98-51.25) per 100 000 persons vaccinated.
CONCLUSIONS: There is a significant increase in the risk of acute myocarditis/pericarditis following Comirnaty vaccination among Chinese male adolescents, especially after the second dose.