Plants 'hijacked' to make polio vaccine
A breakthrough could lead to easier, faster and cheaper vaccines.
Yemen cholera epidemic: Cases exceed 500,000 in four months
The overall caseload has declined since early July, but 5,000 people a day are still being infected.
Japanese fungus spreading in UK hospitals
More than 200 patients have been infected, but none has died, Public Health England confirms.
'Fat but fit' still risk heart disease
Even if medical tests don't show up any problems, being overweight is bad for the heart, experts say.
Anger and hatred can make us feel happy, says study
People have higher life satisfaction if they feel emotions they desire - even if they are unpleasant.
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