We have been learning about the treatment of illnesses in Health. Sir Alexander Fleming discovered mould that could help people fight germs. He called it penicillin. What did he call it at first?

We have tried our own experiment. We put bread, cheese, pear and (thanks to Callum) a cheese puff into sealed bags with some sprinkles of water. Our photos show the changes after just one day. What do you notice has changed?

Edward Jenner did the first ever inoculation. He took pus from a cow pox sore and put it into a cut in a boy. The boy never got small pox. Small pox was a disease that killed people but it doesn’t any more.