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While a stomach bug is undoubtedly an unpleasant experience, its symptoms normally disappear in a matter of a few days. But now researchers have found that a stomach bug found in a majority of people can be quite dangerous in the long term.

A common stomach bug found in two-thirds of the world population can be linked to an increased risk of developing Alzheimer’s disease, according to a recent study by McGill University in Canada.

The research, published in Alzheimer's & Dementia: The Journal of the Alzheimer's Association, analysed the health data of over 4 million people in the UK aged 50 and older between 1988 and 2019.

Researchers found that those who had contracted a common stomach infection called Helicobacter pylori (H. pylori) had an 11 per cent higher risk of developing Alzheimer’s disease.