Following statements have been made about vaccines.

A. Covaxin is a killed cell vaccine and Corbevax is a subunit vaccine.
B. Oral polio vaccine is given as a live attenuated vaccine to adults and as a killed vaccine to children.
C. Third generation vaccines against smallpox are based on attenuated Vaccinia virus.
D. MMR vaccine is given to children to protect them against diphtheria.

Which one of the following options represents the combination of all correct statements?

Correct option is B

The correct answer is: (2) A and C only

Explanation:

• Statement A is correct. Covaxin is a killed cell vaccine made from inactivated SARS-CoV-2 virus, and Corbevax is a subunit vaccine made from the spike protein of the virus.

• Statement B is incorrect. The oral polio vaccine (OPV) is given as a live attenuated vaccine to children, not adults, to prevent poliovirus infection. Adults are generally given the inactivated polio vaccine (IPV), which is a killed vaccine.

• Statement C is correct. Third generation vaccines against smallpox are based on the attenuated Vaccinia virus, which is related to the virus that causes smallpox.

• Statement D is incorrect. The MMR vaccine (Measles, Mumps, and Rubella) protects against measles, mumps, and rubella, not diphtheria. Diphtheria is prevented by the DTP vaccine, not MMR.

Information Booster:

1. Covaxin is an inactivated (killed) vaccine used to protect against COVID-19.

2. Corbevax is a protein subunit vaccine that targets the spike protein of SARS-CoV-2.

3. Oral polio vaccine (OPV) is a live attenuated vaccine and is primarily given to children.

4. MMR vaccine prevents measles, mumps, and rubella, while DTP vaccine is used for diphtheria, tetanus, and pertussis.

Additional Information:

• Option 1 (A and B only): Incorrect because Statement B about the oral polio vaccine is incorrect.

• Option 3 (A, B, C and D): Incorrect because Statement B and Statement D are incorrect.

• Option 4 (B and D only): Incorrect because Statements B and D are both incorrect.