Some people take a medicine that reduces the amount of hydrochloric acid their stomach produces. Studies show that these people are more likely to get food poisoning caused by Salmonella bacteria.
Explain why reducing the amount of hydrochloric acid in the stomach increases the risk of food poisoning.
Suggest one reason why doctors advise these people to be especially careful about how they store and cook food.
A student says that the medicine has stopped the person's immune system working. Explain why the student is wrong.
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.