Obesity could be contagious, scientists say

Researchers believe gut bacteria, which influences two per cent of a person's body weight, could lie dormant and survive outside the body, before transferring to other people

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The sugar tax was the most crucial Budget announcement

Diabetes consumes 10 per cent of the NHS budget in Britain, where almost two-thirds of people are too large. Even in the poorest countries, more people go to bed each night now having consumed too many calories than go to sleep hungry