When I've read about Harrison, it's often as a cautionary tale: if you're going to be standing around outside in the wintertime, wear a good warm coat. Apparently (I haven't tried checking this) he thought it would look bad to bundle up, in Washington D.C. in March, and was thus more vulnerable to pneumonia.

"Apparently" because there are lots of people who sensibly want their children, and other relatives, to wear a coat if they're going to be outside on cold days, and a story with the moral "this person didn't. because he wanted to look good, and he died of it" can be used to convey that message, better than variations on "I'm cold, put on a sweater."