Audio slideshow: Coughs and sneezes...
Persuading people to practise safe sex, eat healthily, and get children to brush their teeth is not easy - but over the years thousands of public health campaigns across the world have tried to do just that, and much more.
Dr Laragh Gollogly from the World Health Organization has brought together some of the most striking posters from past decades in a book. Here, she explains the ways governments and doctors have tried - from fear to humour - to get their messages across.
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All images subject to copyright. Music courtesy KPM Music.
Slideshow production by Paul Kerley. Publication date 9 August 2010.
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