I want to be an Immunologist, so what H.S classes should I take?

Since you are just in high school, just concentrate on learning as much as you can. Make sure you take all the academic courses that you can like Mathematics, English, History, Social Science, Natural Science, Health class, Political Science (or American Government). If you can fit it in, I would take some trade courses like shop, home economics (cooking), auto mechanics, and maybe if they offer it, take a course on constructing a home. They used to do this at many schools but they probably cut back now due to budget constraints. Maybe if they don't offer this course, you could try volunteering for the Habitat for Humanity (if you want) to gain additional trade experiences. Of course, they may not let you construct a house, but they may. In high school, I feel that is the time of your life to learn as much as you can and when you get to college, you can and probably will re-learn most stuff that you have studied in high school but you will be re-fining your educational skills. Also, the more you learn the more you can relate with people with different types of skills which helps strengthen your customer service skills and everyone must have customer service skills.