When Dr Ignaz Semmelweis suggested that doctors wash their hands before operating on patients, senior medical doctors at the time laughed and he lost his job. Can you imagine that? Find out about different kind of germs - killer germs of the past, defeating germs with immunisation and new germs that are creating medical challenges today. Germs: they make you sick is a medical history. At a deeper level it is about the importance of independent thinking and research to create a better future.