Vaccines: practice question

A Microbiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Microbiology · Vaccines

Sample item

What is herd immunity threshold influenced by?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Basic reproduction number of pathogen

Pathogens with higher transmissibility require a larger immune proportion to interrupt sustained transmission and protect susceptible people indirectly.

Option by option

  • A. Colour of vaccine vial

    Vial colour is irrelevant.

  • B. Hospital bed occupancy

    Bed occupancy is not a threshold determinant.

  • C. Only individual vaccine side effects

    Side effects do not set population threshold.

  • D. Basic reproduction number of pathogen (correct)

    Correct: R0 strongly influences required immune proportion.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Microbiology questions

Questions about this Microbiology question

What is the answer to this Microbiology question?

The best answer is D, Basic reproduction number of pathogen. Pathogens with higher transmissibility require a larger immune proportion to interrupt sustained transmission and protect susceptible people indirectly.

Why is "Colour of vaccine vial" not the answer?

Vial colour is irrelevant.

Why is "Hospital bed occupancy" not the answer?

Bed occupancy is not a threshold determinant.

Why is "Only individual vaccine side effects" not the answer?

Side effects do not set population threshold.

What concept does this question test?

It tests Vaccines in Microbiology. The correct option holds because: Correct: R0 strongly influences required immune proportion.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Vaccines?

Make a one-line identity card for each organism: shape and stain, defining test, toxin, disease and drug. Then use the flashcards and the other Microbiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.