How many days does fever last after the measles, mumps, and rubella (MMR) vaccine?
Fever usually refers to an elevated body temperature. After receiving the measles, mumps, and rubella (MMR) vaccine, fever may last for 2–3 days, although the exact duration varies among individuals. For those with better physical health, it typically lasts about 2 days; for those with weaker constitutions, it may last up to about 3 days. If the fever persists without improvement or if high fever develops, prompt medical attention is necessary. Specific details are as follows:
1. About 2 days: Fever following the MMR vaccination is considered a common adverse reaction. This type of fever is generally mild. In individuals with good physical condition, symptoms usually resolve spontaneously within approximately 2 days.
2. About 3 days: However, in individuals with poorer physical health, the fever may last longer, potentially around 3 days.
Typically, the fever remains below 38.5°C. Physical cooling methods can be used, such as applying fever-reducing patches, wiping the body with lukewarm water, and drinking plenty of warm water. A light diet, adequate rest, and avoidance of strenuous exercise are recommended. If body temperature exceeds 38.5°C, antipyretic medications such as ibuprofen tablets or nimesulide tablets may be taken under a doctor's guidance.