stomach bug [healthline.com] 24 to 48 hours after exposure two to six hours. [healthline.com] [healthline.com] [healthline.com] a website that clearly stated known symptoms of each. Is it food poisoning or is it norovirus? [healthline.com] Healthline food poisoning! experience severe dehydration very quickly 24 and 48 hours one common symptom of food poisoning is intense thirst