The objective was to analyze the evidence available in the scientific literature on the concept of vulnerability, in theoretical perspectives and its use, in Primary Health Care. An integrative literature review was carried out with the inclusion criteria: articles in English, full text, peerreviewed, related to vulnerability and primary health care, with the explicit concept of vulnerability, and published until July 31, 2020. The electronic databases accessed were by crossing the descriptors "vulnerability," "vulnerabilities," "primary health care," "primary healthcare," and "primary care." The final sample consisted of 19 articles. The thematic analysis produced 2 themes: "Theoretical foundations of the concept of vulnerability" and "The use of the concept of vulnerability in PHC." In the second theme, 2 sub-themes emerged: Evaluation of health policies, programs, and services and Classification of individuals, groups, and families. There was a plurality of theoretical foundations for the concept of vulnerability and a smaller scope of its use in Primary Health Care. It is expected that the study will subsidize public policymakers and health teams in the design of services and actions aimed at vulnerable populations and in situations of vulnerability.
Keywords: concept formation; health vulnerability; primary health care; review; vulnerable populations.