Skip to content
Skip to main content

About this free course

Download this course

Share this free course

Infection and immunity
Infection and immunity

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

Session 3: Pathogens and human infectious disease


Session 3 provides a brief overview of the many different infectious agents, also known as pathogens [path-oh-jens],that cause infectious diseases in humans and the ways in which these pathogens are transmitted between people, the environment and other animals. The most numerous pathogens are bacteria, as you will discover. In fact, there are more than twice as many different types of bacteria that cause human disease compared to the number of infection causing viruses.

In the video you'll learn more about these two different types of pathogens and how they are different from one another.

Download this video clip.Video player: sdk100_video3.mp4
Copy this transcript to the clipboard
Print this transcript
Show transcript|Hide transcript
Interactive feature not available in single page view (see it in standard view).