Oral rotavirus vaccine, which is primarily used to prevent rotavirus diarrhea, should not be placed in a 20 degree environment for a day. Under normal circumstances it is generally required that oral rotavirus vaccines be stored in a 2 to 8 degree environment and taken within one hour of opening. If the medication is left in a 20 degree environment for up to a day, the medication may become ineffective, in which case it is not recommended to continue using it and will not be effective as a preventive measure. If the current oral rotavirus vaccine has failed, it is not recommended to revaccinate, otherwise it may cause adverse reactions, such as skin allergy, gastrointestinal discomfort, and may not achieve the preventive purpose after vaccination, so it is necessary to change to a new oral rotavirus vaccine in time. After taking oral rotavirus medication, it is necessary to pay attention to observation. If there are symptoms such as diarrhea, nausea and vomiting, fever, etc., it is considered to be allergic to the medication or an acute reaction, and it is necessary to immediately send to the hospital and target treatment.