Which of the following is an example of a localized adverse event after vaccination?

Soreness at the injection site is classified as a localized adverse event because it occurs directly at the site where the vaccine is administered. This type of reaction is typically localized and reflects the body's immediate response to the vaccine, often due to inflammation as the immune system begins to recognize and respond to the introduced antigens.

In contrast, fever and chills are systemic reactions that involve the entire body, indicating a broader immune response. Anaphylaxis is considered a severe and potentially life-threatening systemic reaction, which can affect multiple body systems. Understanding the distinctions between localized and systemic reactions is crucial in recognizing and managing adverse events following vaccination.