Fall diarrhea generally refers to rotavirus enteritis Rotavirus (rotavirus) enteritis is an acute infectious disease of the gastrointestinal tract caused by rotavirus. The pathogen is mainly transmitted through the gastrointestinal tract and occurs mainly in infants and young children, often caused by group A rotaviruses, with peak incidence in autumn, hence the name autumn diarrhea in infants. Clinical manifestations The incubation period is usually 2 to 3 days. The main clinical manifestation is diarrhea with yellow watery stools without mucus and pus and blood, with high volume, usually 5-10 times/day, and in severe cases more than 20 times/day. Initially, most of them are accompanied by fever and vomiting. Isotonic dehydration, metabolic acidosis and electrolyte disorders may occur in cases with severe diarrhea. The duration of diarrhea caused by rotavirus infection is short, usually 3-5 days, and most of them are self-limiting. If the amount of diarrhea is high, urine is low, and the spirit is obviously poor, we should consider infusion; if the spirit is not very poor, but the vomiting is heavy and cannot drink and eat, we should also consider infusion; if the amount of diarrhea is high and accompanied by fever that is difficult to subside, we should also infuse; if the diarrhea is heavy, frequent and high at the beginning, we should not wait, but should immediately go to the hospital for infusion observation ……