If you are passionate about medicine, you likely have a medical trailblazer that you admire. Talk to the interviewer about who that person is to you. If you'd like you can even ask the interviewer the same question in return. This can spark a really interesting conversation that the interviewer won't soon forget.
Here is a sample answer"‹: "A particular trailblazer that I would love to have met is Henry Gray. He wrote the most influential textbook on human anatomy, in 1855, called 'Grey's Anatomy'. The detailed descriptions and illustrations were incomparable to anything in its time. It strongly influenced chiropractic medicine."