The head of the World Health Organization said Saturday he was "rethinking the approach" as outrage widened over his decision to name Zimbabwe’s President Robert Mugabe a goodwill ambassador.

"I’m listening. I hear your concerns. Rethinking the approach in light of WHO values. I will issue a statement as soon as possible", the director general of the UN health agency, Tedros Adhanom Ghebreyesus, said on Twitter