Stomach flu, also known as viral gastroenteritis, typically lasts about 1 to 3 days (24 to 72 hours) for most people, but in some cases, symptoms can persist up to 10 days or even two weeks, especially in severe cases or in individuals with weaker immune systems

. Key points on duration:

• Most common duration: 1 to 3 days (12 to 60 hours) for typical cases

• Severe or prolonged cases: symptoms may last up to 10 days or even two weeks

• Symptoms usually start 1 to 2 days after exposure to the virus

• People may remain contagious for several days after symptoms resolve, sometimes up to two weeks

Common symptoms include nausea, vomiting, diarrhea, stomach cramps, and mild fever, which generally resolve within this timeframe

. Treatment mainly involves rest and hydration, as the illness is viral and usually self-limiting

. In summary, stomach flu usually lasts about 2 days but can extend to 1-2 weeks in more severe or complicated cases.