Skin cancer sufferers could be cured of the disease with new breakthrough drugs, experts claimed, as they hailed the "beginning of a new era".
Seriously ill patients are said to have seen "spectacular effects" after receiving the medication which could eventually be used to combat other forms of the condition. It is the first time scientists have come this close to providing a remedy for advanced melanoma.
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Nearly 1,000 properties have been left without power, and road users have been warned of potentially hazardous conditions.
It follows a surprise summit between South Korea's Moon Jae-in and the North's Kim Jong-un.
Organisers issued a warning about a “dangerous high strength or bad batch substance on site”.