Conversation: The conversation between human and AI assistant.
[|Human|] Hi - am concerned as 4 year old is vomiting and there was talk of Norwalk virus at preschool (although how do they know it was Norwalk in particular), and I am 7 weeks pregnant. What are the risks to the fetus? I miscarried once before at 4 weeks with gastro virus.
[|AI|]  Hi, I understand your concern.  Nor walk virus mostly causes spread of infection in society(a sort of epidemic). Its diagnosis is done by history of consumption of polluted food, symptoms of gastroenteritis, absence of any bacteria, amoebae, parasites in stools. Other blood tests like antigen tests are usually not needed. As the infection is controlled in 1-3 days.  The virus is not known to cause any bad side3 effects on baby. Still its contact must be prevented . As deny Chat Doctor. . Which may create problem in pregnancy.  Thanks.