ChAdOx1 n-COV-19 Vaccine Side Effects Among Health Care Workers in Trinidad and Tobago
Background: The pharmaceutical firms have been lauded for the swift development, trial, approval, and rollout of various Covid-19 vaccines. However, a key issue in the vaccination campaign relates to vaccine hesitancy due to concerns on Covid-19 vaccines safety. Method: A retrospective longitudinal study was carried out via a telephone validated questionnaire among Health Care Workers in Trinidad and Tobago. The questionnaire domains included demographic data, medical and COVID-19 related anamneses, and local and systemic side effects 48 hours after receiving the first dose of the vaccine and 48 hours after receiving the second dose of the vaccine. Results: The questionnaire was administered to a sample of 687 healthcare workers (Male = 275; Female = 412). The results indicated that the incidence of reported fever, body pain, chills, nausea, myalgia, headache, malaise, fatigue and other systemic symptoms declined significantly 48 hours after administration of the second dose compared to the first dose. The Chi-square test and multiple logistics regression results were consistent in demonstrating that younger vaccine recipients were more likely to report fever, body pain, chills, nausea, myalgia, headache, fatigue and other symptoms compared to older vaccine recipients. The multiple logistics regression indicate that female vaccine recipients had greater odds of reporting headache, fatigue, discomfort and less likely to report no symptoms compared to male vaccine recipients, 48 hours after receiving both doses. Conclusions: The findings indicate that on average, vaccine recipients reported fewer number of local and systemic side effects within 48 hours after receiving the second dose compared to 48 hours after receiving the first dose. The findings have implications on public health policy efforts to lower vaccine hesitancy.