Fall diarrhea caused by rotavirus infection is the most common viral enteritis in babies in the fall and winter, and rotavirus enteritis can also cause serious health risks such as intracranial infections, so rotavirus vaccination is essential. The rotavirus vaccine is best administered about two months before the fall and winter seasons each year, and rotavirus-infected babies are usually prone to digestive symptoms secondary to lactose intolerance, so if you are infected with rotavirus, you should supplement lactase to help digest lactose, and take montelukast on an empty stomach to stop diarrhea, or take probiotics to regulate gastrointestinal function. It is also important to manage the diet well and feed small and frequent meals, and to actively prevent and correct dehydration, usually with hypotonic oral rehydration salts.