Which of the following is the first vaccination to be given to infants at birth

  • A: Oral Poliovirus Vaccine(OPV)
  • B: Bacillus Calmette-Guerin Vaccine(BCG)
  • C: Diphtheria,Tetanus and Pertussis Vaccines(DTaP)
  • D: Japanese Encephalitis Vaccine(JEV)
  • E: Measles,Mumpsand Rubella Vaccines(MMR)

答案:

解析: