sciencegcse← B3 lessons

Biology Paper 1 · B3 · Lesson 3.2

Viral diseases: measles and HIV

Learn the cause, spread and control of two human viral diseases.

Key ideas1 of 3

Measles

Measles is caused by a virus. It causes fever and a red rash, and complications can be serious. Infected people release droplets when coughing or sneezing; other people may breathe them in.

Droplets move from an infected person towards another person, with an arrow showing travel through air.

Breathing in infectious droplets can spread measles.

Next: Bacterial diseases →
Topic resources and sources

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 · 4.3.1.2. 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.