 This study examined the safety of the COVID-19 vaccines by evaluating adverse vaccine reactions, AVRs, and patients who had been vaccinated. It found that AVRs were more common in older individuals with multiple medical conditions and taking multiple medications. Additionally, those who had received two doses of the vaccine were more likely to experience an AVR than those who had only received one dose. This article was authored by Isabella Robelska, Zuzana Robelska, Roman Grudzian, and others.