I've been creating these spot illustrations for a monthly newsletter called News in Health, published by the NIH. The current issue and back issues are here. The topics are of course all health related. My first challenge was to delicately illustrate Bipolar Disorder and Stroke.
Major Ups and Downs (bipolar disorder)
Strike Out Stroke (stroke)
"Too Young for Hot Flashes?" (primary ovarian insufficiency)
"Fun Summer Days" (summer health)