Also, #CDC now has a section of their site devoted to #handwashing. https://www.cdc.gov/handwashing/

When to wash hands: https://www.cdc.gov/handwashing/when-how-handwashing.html

"Estimated global rates of handwashing after using the toilet are only 19% " https://www.cdc.gov/handwashing/why-handwashing.html