Choice in Major HELP!

<p>I want to know what some professional people think. I am interested in studying viruses and diseases, and researching and developing vaccines and drugs to fight those pathogens and diseases. I have been doing some research and two very similar careers seem to contain aspects of the all of the above: Medical Scientist (Physician-Scientist) and Pharmacist. In order to be a Medical Scientist, they suggest that I obtain a M.D. and B.S. in a biological science, most likely biochemistry. In order to be a Pharmacist, of course, I would have to obtain a Pharm.D., but, I'm not so much interested in the patient-pharmacist interaction in the career of pharmacy, I just want to research and develop drugs and vaccines. So would it be better to pursue a career in Pharmacy or Medical Science or something else? And if Medical Science, would a B.S. in Biochemistry, M.S. in Microbiology, a M.D. and Ph.D in Medicinal Chemistry suffice?</p>