Hay fever sufferers often say they would do anything to stop sneezing.
But few would contemplate going as far as Professor David Pritchard.
In search of a cure for asthma, hay fever and other allergies, he let 50 hookworms burrow into his arm.
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The professor who put 50 worms in his own body
Science Notebook: James Morgan hears how one man�s brave experiment may work wonders for millions of allergy sufferers
