The vaccines in the immunization schedule for babies from 3 to 4 months old below are recommended by the US Centers for Disease Control and Prevention (CDC). Based on the health status and medical history of each child, the doctor will advise the appropriate type of vaccine and vaccination time for the child.

Diarrhea in infants is a relatively common disease, often caused by bacteria or viruses. Severe cases can cause dehydration and death, so parents need to master some important knowledge about diarrhea.