Dr Adib Rizvi's most distinguishing feature is not just his grey hair. You can spot him in a crowd of people in a cramped hospital corridor by the respect he commands among patients and staff.
It doesn't only come from being the founder and the head of one of Pakistan's largest public health organisations.
Quite the opposite, for a man who's spearheaded a life-long mission of providing "free public health care with dignity," Dr Rizvi is unassuming as he walks around the hospital wards checking on his patients.
Many of them he knows by name. They include children as well as the elderly, Muslims as well as non-Muslims.
The rapport he enjoys with them is striking. He's seen as a friend, someone they trust, someone who's not after whatever little money they may or may not have.
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