A visit to Santa Joana Centro de Imunização will give you a good understanding of the work being performed today in the field of health. Ask when the next open day or tour is scheduled.
This health care facility is located in Bela Vista, but Santa Joana Centro de Imunização isn't the only thing to see in the area. If you're in the mood for more sights, Paulista Museum is worth swinging by too.