Stock up on every health/medicine magizine that is published, read every article and memorize, who wrote each article, the details of such, and come up with interesting anecotes from each. You never know when you'll run into an interviewer who will have published one of those articles. Then write full length reports, 20 page + are preffered, on the specificities... oh just kidding anyway 😛 Basically going with what the people above have said, although in most cases you probably won't even have to do that much reading. Just pick an area, or particular magazine/news source/journal that you like that covers some health topics and get familiar with what the health scene currently is. Also ask past interviewees for some of the questions they were asked in order to get a perspective of how to answer these types of questions. The important thing really isn't in what your answer is, it's how you answer it. Form an opinion, base it on something, and then don't change it. Trust me, they'll try to get you to change your opinion no matter what you said, just stick to your guns and stay true to yourself, and definitely don't just try and tell them what you think they want to hear.