English: The F diagram showing pathways of fecal-oral disease transmission
The vertical blue lines show barriers to disease transmission: toilets, safe water, hygiene & hand-washing.
This schematic comes from a children’s story book UNICEF commissioned that has still not been printed and published. The language is in English and Filipino
UNICEF Philippines and Luis Gatmaitan / 2014 / Gilbert F. Lavides
Original source of the F-diagram: Conant, Jeff (2005). Sanitation and Cleanliness for a Healthy Environment (PDF). Berkeley, California, USA: The Hesperian Foundation in collaboration with the United Nations Development Programme (UNDP), Sida. p. 6. http://www.unwater.org/downloads/EHB_Sanitation_EN_lowres.pdf