This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Types of vaccines, Subject name: Pediatrics
[{'content': 'Which of the following Human papilloma virus subtypes are not covered by Quadrivalent Anti- cervical cancer vaccine? \nSelect and explain. \nA. Type 6, B. Type 7, C. Type 11, D. Type 16', 'role': 'user'}, {'content': 'Answer: B \nExplanation: HPV VACCINE : - Quadrivalent vaccine - Gardasil - Protects against strains 6 ,11,16 & 18. - Bivalent vaccine - Cervarix - Protects against strains 16,18 - These prevent cervical insitu neoplasia grade 2, 3 & adenocarcinoma in situ - Gardasil also prevents serotype related genital was, vaginal & vulvar intraepithelial neoplasia - Both vaccines are immunogenic at 9-14yrs of age & protection persists for atleast 5yrs', 'role': 'assistant'}]