The idea of “One Health” has evolved from earlier concepts and re-definitions of contributions by veterinarians to Public Health, and is based on the complex interactions and inter-dependencies of animal and human populations with each other and the environment. The course will introduce and sensitise the students to these complex relationships, and the role of veterinarians in this context. Through appropriate lectures, tutorials and field trips involving appropriate practitioners of the concept from Hong Kong, it will deepen the students’ exposure and appreciation of the subject matter. This course establishes an intellectual framework which will be carried through and touched upon throughout the curriculum.