Prince Harry and Elton John were among the speakers at last week's 21st International AIDS Conference in Durban, South Africa.

Harry talked about his mother's efforts to stem the tide of AIDS.

“When my mother held the hand of a man dying of AIDS in an East London hospital, no one would have imagined that just over a quarter of a century later, treatment would exist that could see HIV-positive people live full, healthy, loving lives,” Harry said.

“What I believe is that we cannot beat HIV without giving young people in every country the voice that they deserve. Without education and without empowerment, HIV will win,” he added.

Elton John, founder of the Elton John AIDS Foundation, hit a similar note, saying that “young people are being left out and being left behind in the AIDS response.”

(Related: Elton John cheers Prince Harry's efforts to end HIV stigma.)