A passenger train known as Phelophepa — or “good, clean, health” in the Sesotho language — had been transformed into a mobile health facility. It circulates throughout South Africa for much of the year, providing medical attention to the sick, young and old who often struggle to receive the care they need at crowded local clinics.

For the past 30 years — ever since South Africa’s break with the former racist system of apartheid — the train has carried doctors, nurses and optometrists on an annual journey that touches even the most rural villages, delivering primary healthcare to about 375,000 people a year.

The free care it delivers is in contrast to South Africa’s overstretched public health care system on which about 84% of people rely.