The hows and whys of flies and viruses

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For over 40 years, Professor Derek Knottenbelt has been studying equine sarcoids, and he is in no doubt. The disease is growing more and more common and can even be termed an epidemic. So why is hardly anybody talking about equine sarcoids? In this final feature on equine sarcoids, you get the story so far as to why these nasty skin tumours develop.

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All photos in this interview are used with kind permission, courtesy of Professor Derek Knottenbelt.