After receiving the MMR vaccine, you need to be observed in the injection room for half an hour, and you can leave the house with the consent of your physician if there are no other adverse reactions. MMR vaccine is a live attenuated vaccine, mainly through the injection of the vaccine to stimulate the body to produce an immune response, thus preventing measles, mumps, rubella, three infectious diseases, the injection of the vaccine in the local health care institutions to observe for half an hour, no other adverse reactions, after the consent of the physician can go out of the house. Common adverse reactions to the vaccine are pain at the injection site, most of which will disappear within 2~3 days; some patients will have transient fever within 1~2 weeks of vaccination, which generally does not require special treatment, and a few patients will also have skin rashes, and mild parotid and salivary gland enlargement, which will mostly recover on its own, and symptomatic treatment will be given if necessary. If symptoms of discomfort occur after vaccination, you should actively seek medical advice and treatment.