Up to 40% of cancers 'are caused by viruses': Discovery offers hope of vaccines and new therapies

Viruses may cause up  to 40 per cent of cancers including brain tumours and leukaemia, scientists claim. 

If they are proved correct in further tests, it could pave the way for vaccinations against several types of cancer and therapies to cure them.

The claim follows research which has discovered viruses in types of cancer which were never thought to have been linked with infection.   Full Read