The pentavalent oral rotavirus vaccine is mainly for infants and young children, and is necessary because it can help prevent rotavirus infection. Rotavirus infection is common in infants and young children, with summer and fall being the most common seasons, and it is generally highly contagious. After infection with rotavirus, clinical symptoms such as vomiting and diarrhea are common, and in severe cases, dehydration or even hypovolemic shock may occur. In addition, a small number of children may develop myocarditis and encephalitis as a result of rotavirus infection, which is a major health hazard. Pentavalent rotavirus vaccine is generally effective in preventing rotavirus infection, so parents are advised to take their children to receive this vaccine if the family’s financial situation permits. In addition, in daily life, we should pay attention to the child’s dietary hygiene, before and after meals, wash the hands of the child in a timely manner.