A vaccine works because it contains antigens. What is an antigen?
A protein made by white blood cells that sticks to a pathogen and clumps it
A chemical made by white blood cells that neutralises the toxins of a pathogen
A molecule on the surface of a pathogen that the body recognises as foreign
A medicine taken by a person that kills bacteria but has no effect on viruses
176 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.