Measles serum antibody test method is enzyme immunization method, it should be noted that patients should avoid receiving live attenuated measles vaccine within 6 weeks before the test, if the patient suffers from measles, the measles IgM antibody in the body is mostly positive, and the patient’s measles IgG antibody in the recovery period will also be changed to positive. For people suspected of having measles, measles serum antibody test can be carried out by enzyme immunization method. It is worth noting that patients should avoid receiving live attenuated vaccine containing measles components within 6 weeks before measles serum antibody test. If the patient suffers from measles, measles serum antibody test within 28 days after the outbreak of measles will find that the blood is positive for measles IgM antibody. In addition, the measles IgM antibody titer will be more than four times higher in the recovery period than in the acute period, or the antibody that is negative in the acute period will become positive in the recovery period. It is recommended that people suspected of having measles need to consult a doctor in time, and the doctor will choose the appropriate way of examination according to the patient’s condition.