evidence: Some of the most common side effects following COVID-19 vaccination resemble flu symptoms. These include headache and fatigue. However, these side effects are relatively short-lived and aren’t associated with long-term repercussions. Getting COVID-19 is known to increase the risk of potentially serious medical problems. For example, studies have reported an elevated risk of developing blood clotting disorders and cardiovascular problems. While COVID-19 vaccination does carry risks as well, they significantly reduce the risk of severe disease and death. On balance, their benefits outweigh their risks.