Biology Paper 1 · B3 · Lesson 3.8
A quicker immune response and less spread through a population.
A vaccine exposes the immune system to pathogen antigens safely. For example, it may contain dead or inactive pathogen material. White blood cells respond by making specific antibodies.
Vaccines stimulate an immune response; they do not simply supply ready-made antibodies.
No timer. Read the explanation after each answer.
Daily 5 · Exam practice · Download the A4 revision sheet
Core content is shared by Foundation and Higher Tier. Challenge questions ask you to explain and apply it.
AQA Combined Science Trilogy specification · 4.3.1.7. Notes, questions and diagrams are original teaching material.
Rose leaf: LiquidGhoul / Wikimedia Commons, public domain. Mosquito: CDC / Jim Gathany, PHIL 5814, public domain. This photograph shows a vector species; it does not establish that this individual carries malaria.