What are anti-bodies? Why do we wash our hands? What do we do when we are sick? Why do doctors take X-rays? And why do we wash our hands? Find out in the A-Z guide to good health for the little ones! The latest installment in the critically acclaimed 'Duma Says' series by Soweto-based author and illustrator Nathi Ngubane. As seen on Daily Maverick, BBC, Al Jazeera, New Frame and others.