Tony Goldberg has traveled the globe investigating diseases that can move between animals and people. Sometimes that means studying the parasites that attack him along the way, including a tick that hitched a ride from Uganda up his nose.

Goldberg is based at the University of Wisconsin-Madison but was educated in part at the University of Illinois, where he's giving a free public lecture at 4 p.m. Tuesday, Oct. 27. He talked with The 21st Show about his work, how cuts in federal funding have affected disease research, and why human behavior — more than science — may be the weakest link in preventing disease.