The way in which you answer this will be an indicator of your engagement level when it comes to this industry and your career. This is where it is beneficial to research the organization before your interview. Tie your answer into the current activities of this organization. You can elaborate from there. Asking a question in return is a great way to start an engaging conversation with your interviewer about current events in your industry.
"I am so happy you asked me that! I was recently reading an article on how some hospital academic departments are starting to employ clinical research associates in clinical trial units and I would love to know what your thoughts were on this?"
"I have been very interested in and closely following the medical advancements happening in regards to malaria in Africa. As a student, I did a study abroad semester in this region of the world and worked in a clinic that taught malaria prevention strategies. It was such an eye-opening experience for me, and I have been researching this topic ever since."
"I read up on current events in clinical research on a daily basis. It's incredibly important to stay in touch. My favorite resource is Medical News Today. I recently read a fascinating article surrounding researchers from the Queen Mary University of London. They have successfully modified a flu virus and used it to target pancreatic cancer cells. Fascinating!"