What is a common side effect of vaccinations?

Mild fever and soreness at the injection site are indeed common side effects of vaccinations. These reactions are typically signs that the body's immune system is responding to the vaccine and forming protection against the targeted disease. Soreness may occur due to the body's reaction to the injection itself, while a mild fever reflects the immune response being activated to produce antibodies and build immunity.

These side effects are generally short-lived and resolve without intervention, which emphasizes the safety and effectiveness of vaccinations. In contrast, immediate allergic reactions are less common and occur in only a small percentage of individuals, while serious side effects such as loss of consciousness or permanent immunity failure are extremely rare and not associated with standard vaccinations. This highlights the importance of understanding the typical reactions following vaccination, reinforcing the balance of managing expected minor inconveniences against the substantial benefits of immunization.