What are common side effects of vaccinations?

The common side effects of vaccinations typically include soreness at the injection site, fever, and fatigue. These reactions are part of the body's normal immune response to the vaccine, as the immune system is activated to recognize and remember the pathogen that the vaccine is designed to protect against.

Soreness at the injection site is a localized reaction caused by inflammation as the immune system mobilizes white blood cells to the area. Fever and fatigue occur as systemic responses where the body works to build immunity, often indicating that the vaccine is stimulating the immune system effectively. These side effects are generally mild and self-limiting, reflecting a healthy response and often dissipate within a few days as the body adjusts.

Other options present side effects that are less commonly associated with vaccinations. Nausea and headache can occur but are not as typical and may suggest other issues rather than a direct response to the immunization. Diarrhea and vomiting are primarily associated with gastrointestinal illnesses rather than vaccinations. Similarly, increased appetite and dizziness are not recognized as standard reactions to vaccines. Understanding these side effects helps to prepare individuals for what to expect post-vaccination and to distinguish between normal responses and signs of adverse reactions that may require further attention.