4. Use existing health instructions and materials
The publications of Hesperian Health Guides excel in their clear language and explanatory images. They give very concrete manuals about eg getting safe drinking water, preventing infections, building a toilet.
Hesperian Health Guides is a non-profit organization which develops and distributes health materials in over 80 languages. It all started in the seventies with their classic “Where there is no docter”, but also includes publications like “A Community Guide to Environmental Health”, Workers’ Guide to Health and Safety".
Most information can be retrieved from the"Health Wiki" on their website. eBooks cost about USD 7.50. Printed books cost more, but may be obtained free of charge when needed.