Vaccinations are not recommended when a baby has a runny nose. Because the vaccination itself is to inoculate the baby’s body with a small amount of virus, and at this time the baby’s body immunity is poor, it is easy to make the vaccination virus spread, thus causing the disease. Such as in the runny nose during the measles vaccination, because at this time the baby is in the early stages of colds, the body’s immunity is poor, but the chances of getting measles disease greatly increased. At the same time, if because of the runny nose, in the oral antiviral drugs, such as ribavirin granules, etc., in the period of time to give vaccination, easy to make the drug to play a role in killing the vaccine virus, so that the vaccine’s role is greatly reduced.