People with type A blood may be more likely to suffer from travellers diarrhoea, or 'Delhi belly', as it has been dubbed, new research has discovered.
Around four in ten people in Britain belong in this blood group and are more likely to suffer from the condition which is caused by the food bug E.coli. E.coli can better attach itself to cells in the intestines of people with type A blood, meaning the body is less able to fend off the unpleasant infection.
Researchers in the US found people with B or O type blood did not have the same problem, but were not protected from the bacteria.