Sincerely, MAB

So it's no state secret that I'm a huge fan of corny jokes. Or that I'm really in to epidemiology and the health care field in general. I stumbled across this joke a while ago, and reading the whole foo-for-ah surrounding the OMG CHICKEN MCNUGGETS MAKES KIDS STUPID articles that are floating around reminded me of it. So here it is in all its glory:

Q: How many epidemiologists does it take to change a light bulb?