Helen Murray Free

Helen Murray Free (February 20, 1923 – May 1, 2021) was an American chemist and educator. She is most known for creating many self-testing systems for diabetes and other diseases while working at Miles Laboratories. She helped create dip-and-read strips, which are still used to this day.
Free died on May 1, 2021, at a hospice facility in Elkhart, Indiana from problems caused by a stroke, aged 98.