people and medicine
page A 2.1
1. Molecule to medicine 2. Infections 3. Asthma
Types of infection
Infections are caused by microorganisms such as viruses, bacteria, fungi and protozoa. Not all microorganisms are harmful – some of them live all the time on our skin and inside our gut. Microorganisms which are harmful to humans are called pathogens.

In this section, we will take a closer look at infections caused by:

and how to treat them.

Test yourself. Question A 2.1
What do we call microorganisms that are harmful to humans?

Text ©  GlaxoSmithKline