A student in Trinidad observed that after recovering from chickenpox, she did not contract the disease again despite being exposed to infected classmates. Which type of immunity does this represent?

Q: How do I try a free CXC Integrated Science question?

Just tap any of the four options on this page — no signup, no card, nothing to install. You'll see the correct answer and a full mark-scheme-style explanation within a second. Each visit shows a fresh randomly-picked question from the live CXC CSEC Integrated Science bank, so you can keep refreshing to try different ones before deciding whether to create a free account for daily access.

Q: Is Kramizo really free for CXC Integrated Science students?

Yes — completely free. Every student gets 45 questions a day on the free plan, across any board and any subject, with no card required and no trial countdown. Kramizo's optional Pro plan removes the daily cap and adds analytics, but the free plan is genuinely free forever. We make money from the small percentage of students who choose to upgrade — not from selling data or ads.

Q: Are the Integrated Science questions aligned to the CXC CSEC syllabus?

Every question is written against the published CXC CSEC Integrated Science syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real CXC past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

Question

A student in Trinidad observed that after recovering from chickenpox, she did not contract the disease again despite being exposed to infected classmates. Which type of immunity does this represent?

Accepted Answer

Natural active immunity — Award 1 mark for identifying that exposure to the pathogen naturally stimulates the body to produce its own antibodies. A is incorrect — passive immunity involves receiving ready-made antibodies, not producing them. B is incorrect — artificial passive immunity involves injection of antibodies. D is incorrect — artificial active immunity involves vaccination, not natural infection.

Answer

Artificial active immunity

Answer

Natural active immunity

Answer

Artificial passive immunity

Answer

Natural passive immunity

One real Integrated Science question.No signup. 30 seconds.

One real Integrated Science question.
No signup. 30 seconds.