If the symptoms of cold and flu are not very serious within three days after the vaccination, it is best not to take cold and flu medication to avoid affecting the role of the vaccine. Within three days after the vaccination, it is recommended that the child: first, try not to take any oral medication; second, do not take the child to public places or do not take the child out to avoid the occurrence of colds or cross-infections; third, it is best not to give the child a bath, and in particular, pay attention to the area of the vaccine should not be wet to avoid the formation of local infections, causing fever. If the child does have a cold, the symptoms are more serious, such as fever or sore throat is more obvious, can be given oral Chinese medicine cold drugs, such as pediatric black cohosh clear heat particles, at the same time must drink more water, feed water, conducive to the recovery of the disease of the child.