Stomach Flu Outbreak 2025 News. The ongoing summer heat is fuelling an epidemic of gastroenteritis, also known as ‘stomach flu’, with mumbai seeing a 44 per cent rise in the number of cases reported in april. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite.
During the 2025 southern hemisphere flu season, most countries experienced similar levels of flu activity compared to trends observed in prior seasons (2017‒2019 and. Like when the news broke in march 2025 that bird flu had spread to dairy cows.