Every winter, cases of “stomach flu” surge across the U.S.—but what’s really behind the waves of vomiting, diarrhea, and sudden illness that shut down schools, cruise ships, and households? In this episode, we break down infectious gastroenteritis and foodborne illness, with a special focus on norovirus—the most common cause of acute gastroenteritis in the United States. We explore why these illnesses spread so rapidly in colder months, how a tiny virus can trigger violent vomiting through gut-brain signaling, and why outbreaks continue despite modern sanitation and widespread awareness .
Beyond the symptoms, we examine the real risks people often underestimate: dehydration, electrolyte imbalances, fainting, kidney injury, and serious complications in young children, older adults, and pregnant people. This episode also clears up common myths—why the “stomach flu” isn’t influenza, why hand sanitizer doesn’t reliably kill norovirus, and why food poisoning and viral gastroenteritis are so often confused. We finish with practical, evidence-based guidance on treatment, recovery, prevention, and food safety—so you know when to rest at home, when to seek medical care, and how to reduce your risk the next time a winter outbreak hits
