In case of injury, engineered bandages with embedded antimicrobial nanoparticles will stop deep bleeding in a matter of minutes and keep the wound free from infection.

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"We can't say for sure how much of that benefit is down to the yoghurt and how much they are down to a whole range of infection control procedures that the hospital has in place such as the deep cleaning programme, the bare-below-the-elbow programme, and the increased isolation procedures, " Ms Heyes said.

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Born Arthel Lane Watson in Stoney Fork Township, near Deep Gap, North Carolina, on March 3, 1923, Watson was blinded from an eye infection as a baby.

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The larger the particle, the less likely it is to penetrate deep into a victim's lungs, where it can cause a more severe form of the infection.

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