![]() Finally, participants infected with COVID-19 before vaccination was significantly associated with side effects such as fever, chills, shortness of breath, and persistent cough. The number of reported side effects was significantly higher after the second vaccine dose than after the first dose. Males aged less than 20 years and smokers were significantly less likely to complain of adverse events. ![]() Eight participants reported rare side effects, including 7 (0.6%) cases of thrombocytopenia and one (0.1%) case of myocarditis. Allergic reactions were reported by 12.7% of the participants furthermore, participants with a history of allergy or anaphylaxis before vaccination had a significantly higher tendency for post-vaccination allergic reactions. The most commonly reported adverse events were fever, chills, headache, fatigue, pain and swelling at the injection site, muscle pain, and joint pain. Approximately one-third of participants reported no adverse effects after receiving the first, second, or third doses (34%, 33.6%, and 32.5%, respectively). All participants received at least one dose of the Pfizer-BioNTech COVID-19 vaccine. In total, 1137 participants completed the questionnaire, 33.2% were males, and the mean age was 21.163 years. Data were analyzed using SPSS version 22. The Chi-square, Fisher’s exact, and McNemar’s tests were used to investigate significant relationships. MethodĪ questionnaire-based retrospective cross-sectional study was conducted using a university website (Ritaj), social media platforms (e.g., Facebook and Telegram), and in-person interviews. Therefore, this study investigates the post-vaccine adverse events following the Pfizer/BioNTech COVID-19 Vaccine administration in Palestine and identifies the occurrence, extent, and severity among university staff, employees, and students at Birzeit University. At the time of the study, December 2021, Palestine lacked a national reporting system for monitoring adverse vaccine effects. Therefore, it is preferred by most recipients however, many people are concerned about the vaccine’s side effects. The Pfizer BioNTech COVID-19 vaccine was the first to receive emergency authorization and approval from the FDA.
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