http://www.waldenu.edu/Degree-Programs/Doctorate/PhDin-Public-Health.htm - Before trying to obtain a Public Health Ph.D., you first need to complete an undergraduate and postgraduate program in health sciences. After which, you need to find a school that offers Public Health Ph.D. programs. You can look for websites that offer courses for Ph.D. in Public Health online. Take note that you need to complete all the admission requirements set by the school before you can acquire your Ph.D. in Public Health.