Smallpox was once a common disease but it no longer exists anywhere in the world. How did vaccination achieve this?
The smallpox virus changed into a form that could no longer infect any person
Antibodies against smallpox are now passed from parents to their own children
The smallpox virus was destroyed by antibiotics that were given at the same time
So many people were immune that the virus could not spread to new people
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.