"No, we don't know about the four F's."
"What do you MEAN you don't know? Don't you know they are the ways that you can get sick?"
"No, tell me what they are."
"They are Feces, Flies, Food, and Fingers"
...and so on.
Here is a video of group of kids doing a recitation of the Four F's. You can hear my uncertain, nervous laughter at the end of the skit when they ask how the Four F's affect their lives and a child collapses to the ground. We weren't sure if the skit was done or not. It was unlike any school performance we'd ever seen to have it end with a child falling down to indicate death. But, ultimately, I love it. This is the intersection of global health and global education. (Wait a few seconds for them to speak in unison and the sound will be clearer)