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Cardiovascular Effects of the BNT162b2 mRNA COVID-19 Vaccine in Adolescents Study focuses on cardiovascular effects, particularly myocarditis and pericarditis events, after BNT162b2 mRNA COVID-19 vaccine injection, in Thai adolescents, 13 to 18, both sexes This prospective cohort study, students from two schools aged 13–18 years, who received the second dose of the BNT162b2 vaccine. All healthy and without any abnormal symptoms before receiving the second dose of vaccine. Data collected Demographics Symptoms Vital signs ECG, echocardiography Cardiac enzymes Collected at baseline, Day 3, Day 7, and Day 14 N = 314 Analysis, n = 301 Cardiovascular effects Found in % of patients, ranging from tachycardia, palpitation, and myopericarditis. Most common cardiovascular effects Tachycardia
