This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of Immunization and Vaccination, Subject name: Social & Preventive Medicine
[{'content': 'All of the following vaccines are contraindicated in pregnancy EXCEPT: \nSelect and explain. \nA. Measles, B. Rubella, C. BCG, D. Tetanus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) TetanusRef : K. Park 23rd ed. / 312* All live and meningococcal vaccines are C/I in pregnancy EXCEPT: YF and OPV* Measles, rubella and BCG are live vaccines while Tetanus is from toxoid category.* Remember, these live vaccines can't cross the placenta* These vaccines are still contraindicated because pregnancy is an immune-compromised state, they might harm mother.Vaccines Indicated During Pregnancy* Killed* Toxoids (tetanus)* Cell fraction (Hep A, Hep B)* OPV and YF", 'role': 'assistant'}]