Norovirus can generally be cured in about 3-7 days, but the exact time depends on the individual’s constitution, the degree of virus infection and the effectiveness of treatment. Norovirus is a common type of virus that can cause diarrhea as well as gastroenteritis, with clinical manifestations of nausea, vomiting, abdominal pain and diarrhea. The disease is a self-limiting disease, and most patients can be cured after 3-5 days of symptomatic supportive rehydration treatment without the use of antiviral therapy. If the child is in poor health, or is seriously infected, or even complicated with myocardial damage, the recovery time may be extended to about 7 days or even longer, depending on the individual treatment effect. It is recommended that patients infected with norovirus should take more rest and drink more water to promote metabolism, and pay attention to a light diet, wash hands regularly before and after meals, and strengthen personal hygiene care.