Find out about the bacteria that live in and on us and keep us healthy.

Take a look at the bacteria that are on your skin and live in your mouth, ears and nose - and that sit on the dirty screen of your mobile phone.

So what exactly happens when we get sick?

Explore devastating infections through the ages, alongside crucial scientific discoveries to help control them.

What kind of antibiotics are there? What do they do? And why do they have to have such complicated names?

Find out how superbugs emerge and spread between people and around the world.

Explore our simulation to understand how certain infections can cause devastating pandemics.

An overview of how our immune system fights infections.

Find out what vaccines are and how they work.

For further information about microbes, infections and vaccines.