Q. Which of the following vaccines is/are examples of toxoid vaccines?
  1. MMR vaccine
  2. DTP
  3. Pneumococcal
  4. Meningococcal
Select the correct answer using the codes given below:

Answer: Only 2
Notes: Only DTP is a toxoid vaccine, as it contains diphtheria and tetanus toxoids. MMR is a live attenuated vaccine. Pneumococcal and meningococcal vaccines are conjugate or subunit vaccines, not toxoid. Toxoid vaccines use inactivated toxins to protect against diseases caused by bacterial toxins.