In the WHO pdf above section 5.1 discusses preparation of bleach solutions. First they note that ordinary household bleach comes in 5%. Then the article notes that a 1:10 bleach solution is is strong and used to clean excreta and bodies. A 1:100 bleach solution is used to clean surfaces, equipment, bedding, reusable protective clothing...

Terminology question -- Household bleach is 5%, 1:10 is 10% (stronger) and 1:100 is 1% (way weaker). How do you get a 10% solution when starting with household bleach at 5%? ...or are they really saying 1:10 starting with household bleach and then cut that again to get the 1:100 solution? So 1:10 is really a .5% solution. Easy to get confued when terminology is mixed.

BTW, using the CDC guidelines, Dallas really messed up by using a pressure washer to clean up the hazardous waste site where their Ebola patient puked on the sidewalk. Sounds like a city bureaucrat told sanitation to clean "it" up and no one bothered to mention what "it" was. I wonder if those sanitation workers are on the list of peeps that need to be observed...