‘I was 13 when I first tried heroin and I was hooked immediately,’ says Yevgeny Selin.

When Yevgeny turned 24 he started combating his drug dependency with Opiate Agonist Therapy (OAT) in the city of Donetsk in eastern Ukraine. Backed by the World Health Organization, OAT replaces hard drugs like heroin with less potent substitutes. It is one of the most effective methods of reducing opioid misuse and preventing HIV.