This book prepares and guides individuals who are about to embark (or already have embarked) on a health/medical PhD journey, with a specific focus on Public Health. Based on the author's experience as a recently graduated Doctor of Philosophy (PhD) student, readers benefit from the knowledge imparted and lessons learned, including an analysis of the different aspects of a Public Health doctoral degree, and practical tips and guidance on how to go about this journey from the initial phase of choosing a research niche up until the oral examination (also called defence). All throughout the book, the author shares examples from her own journey to show that in spite of sacrifices and hurdles along the way, hard work, perseverance, and supportive resources can help see you through, eventually, to a hopefully positive outcome at the end. Using an informal style, the author provides a step-wise guide, from chapter to chapter, on the various essential aspects that need to be considered, including: (1) The initial steps towards a PhD; (2) Proposal, permissions and funding; (3) The fieldwork; (4) The art of data analysis; (5) The hurdles along the way -- a personal experience; and (6) What comes after the completion of a PhD? Intended to be a compact go-to guide for students throughout their PhD journey, both from an academic and personal perspective, "To Do or Not to Do a PhD?" engages readers who are about to enroll in or who already have started a PhD, especially in public health, epidemiology, and health/medical fields of study. The brief also would appeal to postgraduate and undergraduate students who are interested in learning about how to write a research proposal, draft a scientific paper for publication in a journal, or prepare a thesis.