As we tidy away the Dracula capes and glow-in-the-dark plastic fangs for another winter, one notorious blood sucker has had a particularly good year. For the first time the medicinal leech Hirudo ...

He also describes how leeches contain the most powerful anticoagulant known to man. This short film is from the BBC series, Michael Mosley: Infested! Living with parasites. In this short film Dr ...