marburg is just like ebola, but it hasn't had a movie made after it. [laughter] there were two infections a few years back, and our staff went in there to try to understand how the bats were moving around the region and what might be able to be done to control marburg there. and i asked them, weren't you scared to go into this cave that had 10,000 bat, lots of them with marburg, an often fatal virus, and this enormous python? they said the python didn't worry us and the bats didn't worry because we were wearing those moon suits and the marburg didn't worry us. the cobras worried us. [laughter] and underneath their moon suits, they had to wear leather chants so that -- chaps so if they had a cobra strike, they wouldn't be killed by it. sometimes that kind of experience does make people too used to risk. and we have to always remember that above all, do no harm needs to be more than a motto. it needs to be an organizing principle for all of our work. now, like other health care workers, i have my personal experiences with risk. sometime back i was workin