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A _______ is a tiny life form that can cause illness.
Yeast is a fungus that we use to make bread, beer and wine; other _____ can cause diseases such as athletes foot.
On holiday he caught a _____.
Consisting of just one cell, we use ________ to make yoghurt and cheese, but they can also cause diseases such cholera and food poisoning.
He tried to escape from the ____.
His ____ is covered in tattoos.
Introducing small quantities of _________ to the body to stimulate the production of antibodies.
Discovered by Alexander Fleming in 1928, penicillin is an __________ that kills some kinds of bacteria.
Cholera is a terrible _______.
____________ helps to prevent catching diseases.
A jab is an injection of a _______ that makes you immune to a disease, such as measles.
She will faint at the sight of _____.
When he ___ his leg there was a flood of blood.
The ____ on Jarryd's knee took a long time to heal.