Assertion (A): A child who has had an acute attack of poliomyelitis should be administered oral polio vaccine.

Reason (R): There is no cross-immunity between the different types of polio viruses.

Question

Mission Indradhanush is for:

Answer 1

This question checks two separate claims about polio vaccination. We look at each one on its own before deciding if the second explains the first.

Is the assertion correct? Yes. A child recovering from paralytic polio caused by say type 1 virus is still open to infection from type 2 or type 3. So OPV is not stopped for this child, it continues as scheduled.
Is the reason correct? Yes. The three poliovirus serotypes do not give each other backup protection. Getting sick with, or vaccinated against, one type barely touches immunity to the other two.
Does the reason explain the assertion? Not really. India's OPV strategy during National Immunization Days is to dose every child under five years regardless of prior polio history, so that the whole community builds strong gut immunity and breaks the transmission chain. The absence of cross-immunity is a true biological fact, but it is not the operational reason doctors quote for continuing OPV in this child.

So both statements stand true by themselves, yet the reason does not properly explain the assertion.

Let's summarize:

One serotype infection does not protect against the other two, this part is true.
OPV continues for such children mainly because mass campaigns vaccinate every child, not purely due to the cross-immunity gap.

The correct choice is that both A and R are true but R is not the correct explanation of A.

Answer 2

This question checks two separate claims about polio vaccination. We look at each one on its own before deciding if the second explains the first.

Is the assertion correct? Yes. A child recovering from paralytic polio caused by say type 1 virus is still open to infection from type 2 or type 3. So OPV is not stopped for this child, it continues as scheduled.
Is the reason correct? Yes. The three poliovirus serotypes do not give each other backup protection. Getting sick with, or vaccinated against, one type barely touches immunity to the other two.
Does the reason explain the assertion? Not really. India's OPV strategy during National Immunization Days is to dose every child under five years regardless of prior polio history, so that the whole community builds strong gut immunity and breaks the transmission chain. The absence of cross-immunity is a true biological fact, but it is not the operational reason doctors quote for continuing OPV in this child.

So both statements stand true by themselves, yet the reason does not properly explain the assertion.

Let's summarize:

One serotype infection does not protect against the other two, this part is true.
OPV continues for such children mainly because mass campaigns vaccinate every child, not purely due to the cross-immunity gap.

The correct choice is that both A and R are true but R is not the correct explanation of A.

Show Hint