This document outlines the challenges to the right to health care from a comparative legal perspective. It discusses the meaning of the right to health care under international law, focusing on developments in general comments and monitoring obligations. It also examines how the right is incorporated into national laws globally and trends toward more explicit recognition. Case studies are presented on litigation of health care access at the European Court of Human Rights regarding issues like medical treatment for prisoners and rationing decisions by national courts. Future challenges are discussed such as expanding the definition of human rights in health, the role of courts and guidelines in addressing rationing dilemmas, and ensuring fair processes for decision-making. Relevance for Ukraine is also noted.