IB skill practice

Use immunity, pathogens, and vaccination models

Paper 1, Paper 2 5 marks Difficulty 3

Explain vaccination memory

A vaccination diagram in a neurobiology tutorial shows antigen exposure followed by memory cell formation. Explain why a later infection can be controlled faster. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.