This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'In which of the following, virus is shed in stool? \nSelect and explain. \nA. Herpangina, B. Influenza, C. Varicella, D. Smallpox', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Herpangina:\nRespiratory viral shedding can persist for up to 3 weeks and in the stool for up to 8 weeks. Patients are most contagious at this stage.\nInfluenza:\nPeople with flu can spread it to others up to about 6 feet away. Most experts think that flu viruses spread mainly by droplets made when people with flu cough, sneeze or talk.\xa0\nVaricella (Chickenpox):\nChickenpox is transmitted from person to person by directly touching the blisters, saliva or mucus of an infected person.\nSmallpox:\xa0\nThey spread the virus when they coughed or sneezed and droplets from their nose or mouth spread to other people. They remained contagious until their last smallpox scab fell off.', 'role': 'assistant'}]