The parents of Gaurav Bains have described their joy after a bone marrow match was found for the two-year-old.
A public appeal by Gaurav's parents, Sunny and Gurpit, prompted a huge increase in the number of donors coming forward.
Guarav's father, Sunny, said he could not believe it when he heard the news: "When we were told that there was a matching donor, we just couldn't believe it.
"Our feelings towards Gaurav's donor are overwhelming because that person is giving Gaurav such an important gift. If I could, I would go to meet Gaurav's donor right now and give them the biggest hug in the world."
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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”.