So it becomes quite rational to deny services to injectors.

You see the peak in drug injectors before they started the national needle exchange program.

Moscow, Jakarta we're talking, at its peak, one in two injectors infected with this fatal disease.

And in all of those countries, you can see, not more than four percent of injectors ever became infected with HlV.

Now, in the rest of the world, we've got basically nothing going on in the general population very, very low levels but we have extraordinarily high levels of HlV in these other populations who are at highest risk drug injectors, sex workers and gay men.