At the back of his mind, Abdullahi Noor carries a story that refuses to fade, a tragic reminder of what drug and substance addiction can do.

As a harm reduction advocate, Noor has encountered many heartbreaking accounts, but one in particular continues to haunt him. "I will never forget those two brothers.

It is a story that has stuck with me for years," Noor told The Standard.

The elder brother was already deeply entrenched in heroin use and living with HIV, a secret he kept even from those closest to him.