Doctors once believed Hayley Okines might not live past her early teens. She reached 17 and used those years to show how fully a short life could be lived.

Born on 3 December 1997 in England, Hayley was diagnosed at the age of two with Hutchinson-Gilford progeria syndrome, an extremely rare genetic condition that causes rapid premature aging. Children with progeria typically age about eight times faster than usual. They experience hair loss, thin skin, joint problems, cardiovascular disease and other features normally associated with old age, while their minds develop at a normal pace. Average life expectancy at the time of her diagnosis was around 13 years.

Rather than withdraw from public view, Hayley spoke openly about her condition. She appeared in multiple television documentaries, including the British series Extraordinary People, and travelled to the United States to take part in experimental drug trials aimed at treating progeria. These experiences, along with her everyday life as a teenager who loved music, fashion and friends, formed the basis of two books: Old Before My Time (published when she was 14) and the later Young at Heart.

Hayley became known in the media as the “100-year-old teenager.” Through interviews, her writing and public appearances she helped bring global attention to a disease most people had never heard of, supporting research efforts and giving a human face to the challenges and ordinary hopes of those living with progeria.

On 2 April 2015, after developing pneumonia, Hayley died at home in Bexhill-on-Sea, East Sussex, at the age of 17 — four years beyond the lifespan doctors had originally projected. She died in her mother’s arms.

Her life was short by ordinary measures. The awareness she raised, the books she left behind and the example of living fully despite severe physical limitations created an impact that outlasted her years.

Sources:

• Wikipedia entry and contemporary obituaries from BBC News, The Guardian, The Mirror and other outlets covering Hayley Okines’ diagnosis, public advocacy, books (Old Before My Time and Young at Heart), participation in research trials, and death on 2 April 2015 at age 17 from complications of progeria and pneumonia.