Class question

In a discussion of the "pursuit of happiness" in class last week, I asked for a show of hands of the students who would make the following highly hypothetical choice:

Imagine that you could save 100 30-year-old people from a deadly disease. Without your intervention, they die at age 30, and with your intervention they live a normal lifespan. However, in return for this miraculous outcome, you must live with a dull, low-level headache for the rest of your life. 

Only three hands went up. Out of about fifteen students in attendance. And they didn't look very cheerful about it.