The main vaccine to prevent diarrhea in children is the rotavirus vaccine, because many children, especially in infancy, often suffer from rotavirus enteritis, which causes diarrhea and an increase in the number of egg-like stools, which can cause dehydration and electrolyte disorders, seriously affecting the health of children, so children are vaccinated against rotavirus. After a child has been vaccinated against rotavirus, the chances of having another rotavirus infection are greatly reduced, and the symptoms are very mild if the infection occurs.