Class 12 Zoology simulations · Human Health and Disease

Primary and secondary immune response

Meet an antigen once, then again later. Memory cells make the second (secondary) response faster and much stronger.

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What to notice

This immunological memory is the basis of vaccination.

Key relation

Secondary (anamnestic) response: shorter lag, higher and longer antibody level

Try this

Move the second exposure earlier or later. Does the secondary response still appear?

What you can change

• Second exposure on day: 20 to 80 day
• Day now: 0 to 120 day

More in Human Health and Disease

• Structure of an antibody
• Life cycle of Plasmodium (malaria)

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