CAPE TOWN - Meet Sister Colleen Grehan, a nurse who has never taken a sick day in her 35-year career at Groote Schuur Hospital.
Grehan's story was placed on the hospital's Facebook page entitled "Heroes of Groote Schuur".
The hospital wanted to pay homage to her service as she retires.
"Today Groote Schuur Hospital is saying goodbye to one of the greatest heroes to ever grace its corridors. Sister Colleen Grehan is retiring after 35 years. She's never taken a single day's sick leave. Not. One. Day," the page said.