It is not recommended to vaccinate infants during the period of taking medication, is taking medication that is in the period of the disease, whether it is infectious or non-infectious diseases, usually during the period of the disease is not recommended to play, because this time vaccination body will produce an immune response, may aggravate the symptoms of the original disease, but also may appear allergic reaction to the medication is more likely to be more likely to occur. Vaccination during the disease is also more likely to have children with digestive symptoms, such as loss of appetite, nausea, vomiting, diarrhea, bloating, etc., vaccination is more likely to have allergic symptoms such as rashes, but also digestive symptoms or respiratory symptoms, but also may aggravate the original disease.