Updated 31 October 2019
WATCH: Why fat is so essential to your diet
Not all fats are bad.
There have been confusing messages about fat over the years - but some fats are good for you.
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E-cigarettes have become hugely popular in the past decade, but a rash of vaping-linked deaths and illnesses in the US is feeding caution about a product that's already banned in some places.
A new drug works by targeting an immune system antibody called immunoglobulin E, which is responsible for the allergic reaction that causes hives.