At the end of June, Gregory Ah-Kuoi got a cold he could not get rid of.
His health deteriorated quickly, and soon he was struggling just to tie his shoelaces.
Then, a month ago and aged just 13, he was given a shock diagnosis. He had pre-B acute lymphoblastic leukaemia.
Each year 50 Kiwi kids are diagnosed with leukaemia - the most common form of cancer in children. While many of them beat the disease, the treatment is long and challenging.
Gregory said he is confident he will survive it: "I'm going to kick it in the butt."