Adverse reactions to the MMR vaccine

MMR vaccine is a combined vaccine against measles, mumps, and rubella, used to prevent these three common acute respiratory infectious diseases in children. So, what adverse reactions may occur after receiving the MMR vaccine? Let’s take a closer look.

Adverse Reactions Following MMR Vaccination

1. Pain

Pain is a common adverse reaction. Local pain and tenderness at the injection site may occur within 24 hours after vaccination and typically resolve spontaneously within 2–3 days.

2. Fever

A transient fever may develop within 1–2 weeks after vaccination. Mild fever usually lasts 1–2 days and resolves spontaneously without specific intervention. Affected individuals should rest appropriately, drink plenty of water, stay warm, and avoid secondary infections. For moderate fever or fever persisting beyond 48 hours, physical cooling measures or antipyretic medications may be used symptomatically.

3. Allergic Reactions

Allergic reactions are extremely rare but may include allergic rash, anaphylactic shock, allergic purpura, and immune thrombocytopenic purpura. Immediate medical consultation is essential; emergency treatment may be required.

4. Rash

A scattered rash may appear 6–12 days after vaccination. The rash typically lasts no longer than two days and generally requires no specific treatment; symptomatic management may be considered if necessary. Mild swelling of the parotid and salivary glands may occasionally occur and usually resolves spontaneously within one week.

The above outlines the potential adverse reactions following MMR vaccination. Mild reactions usually require no special treatment, whereas severe reactions necessitate prompt medical attention and appropriate management. We hope this information is helpful to you.