Pathogens and communicable disease
Pathogens and communicable disease
A communicable disease is an infectious disease that can spread from one organism to another. It is caused by a pathogen, which is a microorganism that causes disease.
Step-by-step lessons on AQA GCSE Biology 3.1.1 Communicable (infectious) diseases. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.