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What is a Pathogen?

What is a Pathogen?

A pathogen is any microorganism or infectious agent that causes disease. Communicable diseases are those that can be transmitted from one host organism to another.

Communicable diseases, disease prevention and the immune system Lesson

  1. A Level
  2. /Biology
  3. /Communicable diseases, disease prevention and the immune system

Step-by-step lessons on OCR A A Level Biology Communicable diseases, disease prevention and the immune system. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons