A team of researchers at Cardiff University has discovered stem cells in the cheek can be used to supress the immune system. It should help patients with certain types of diabetes, and those whose bodies reject organs after transplants.
It'll be several years before a treatment's developed but the scientists say it's a real breakthrough.
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It will be a sunny day for most, although rather windy. Cloud will increase from the east through the afternoon.
A warm and pleasant evening for many. Clear and cool overnight.
Continuing to be a fine and dry day across the country with lengthy sunny spells.