Re-infection and Side Effects after COVID-19 Vaccination: A Cross-Sectional Study from Iran

Abstract

Background: The effectiveness of vaccination as one of the management strategies of the Covid-19 pandemic should be investigated and its results should be considered as a lesson learned in facing future crises.

Objectives: This study was conducted determining the rate of reinfection with COVID-19 after vaccination and the side effects of vaccination.

Methods: In this cross-sectional descriptive study, 351 employees who had undergone corona vaccination were examined by available a random sampling method. To collect data, a personal profile form and a researcher-made questionnaire were used.

Results: About 42% of the employees were infected before the injection of the vaccine, and the rate of COVID-19 after the injection of the first dose, the second dose and the booster dose was 16%, 19.1% and 14.8% respectively. 24% of the samples did not report any side effects after the vaccine injection, but other people reported the most common side effects as "fever and sweating" (42.5%), "weakness" (38.5%), "headache" (33.6%)" and "injection site pain (32.8%)" reported.

Conclusions: The main side effects reported were general symptoms and the body's response to the corona vaccine injection, which is the case for many other common disease vaccines. But the remarkable thing about the reported side effects is that the frequency of common side effects reported in the third dose has decreased compared to the first and second doses.