This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Viral Diseases in Children, Subject name: Pediatrics
[{'content': 'True about measles are all EXCEPT? \nSelect and explain. \nA. Koplik spots appear in prodromal stage, B. Fever stops after the onset of rash, C. Vaccine given at 9 months, D. It is not infective before the rash appears', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Measles: Koplik spots appear in prodromal stage Symptoms subside after appearance of rash Vaccine given at 9 months Patient is infective 4 days before & 5 days after appearance of rash NELSON: Symptoms increase in intensity for 2-4 days until the 1st day of the rash.', 'role': 'assistant'}]