The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period. Since immunizations have nearly eliminated life-threatening diseases such as polio, the human immune system increasingly targets other environmental substances in order to keep working properly. Allergy symptoms such as runny nose and itchy eyes result when the immune system attacks pollen that is breathed in from the air.

Question

The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period. Since immunizations have nearly eliminated life-threatening diseases such as polio, the human immune system increasingly targets other environmental substances in order to keep working properly. Allergy symptoms such as runny nose and itchy eyes result when the immune system attacks pollen that is breathed in from the air.

Which one of the following best expresses the main point of the passage above?
Group of answer choices

The use of immunizations has led to an increase in allergies.

Viruses that once caused polio now cause allergies.

Immunizations have been very successful in eliminating life-threatening diseases.

Immunizations often have surprising side effects.

Answer 1

The use of immunizations has led to an increase in allergies?

Answer 2

Yes,that is what the first sentence says:

"The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period.

Answer 3

The use of immunizations has led to an increase in allergies.

Answer 4

The main point of the passage is: The very large increase in allergies over the last thirty years is due to the great success of immunizations administered over this time period.