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: Social & Preventive Medicine
[{'content': 'Rabies vaccine is prepared from which strain of virus: September 2010 \nSelect and explain. \nA. Street virus, B. Fixed Virus, C. Wild virus, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Fixed Virus There are three main types of rabies vaccine: Vaccines containing animal brain tissues - Rabies virus phenol- or BPL-inactivated vaccines using as a substrate sheep or goat or brain. It contains nerve tissue. - Rabies virus BPL-inactivated vaccine use as a substrate suckling brain mouse, with a decrease myelin content. An vaccines using as a substrate duck embryo, are inactivated by b propiolactone, and purification is done by ultracentrifugation. Cell-cultured vaccines Human diploid cell culture vaccine (HDCV) is grown on human fibroblast, inactivated by b propiolactone. Primary hamster kidney cells (PHKC) rabies vaccine is grown on hamster kidney cells, inactivated by formalin inactivated. Purified chick embryo cells culture vaccine (PCEC) is inactivated by b propiolactone purified by ultracentrifugation Purified Vero rabies vaccine (PVRV) is grown on Vero cells, inactivated by b -propiolactone and purified by ultracentrifugation. Rabies vaccine adsorbed vaccine (RVA) uses a Kissling strain of rabies virus adapted to a diploid cell of fetal rhesus monkey lung fibroblast, inactivated by b-propiolactone, and containing alum phosphate.', 'role': 'assistant'}]