The objective of the article is to determine the content and correlation of individual and joint interest within medical legal relations in Ukraine. To achieve this objective the authors have applied general scientific and special methods of cognition. The materials of research were statistical data on infectious diseases about the state of vaccinations in Ukraine, judicial practice, and national legislation. It has been concluded that individual and joint interest within medical legal relations are aimed at various objects: individual and public health. These objects are interconnected as general and special, since public health is a combination of individual health. It has been established that public and individual health does not have an economic content, cannot participate in the economic turnover, but have a social value. The prevalence of joint interest over the individual has been grounded. Individual interest within medical legal relations has been defined as the orientation of an individual to protect own health. It has been proved that joint (public) interest within medical legal relations is a set of individual (private) interests of individuals in the health care area. This interest is manifested in the formation of collective immunity, control over the spread of infectious diseases, the creation of conditions for affordable medical care, etc.