Many people with health problems or disabilities leave the labour market permanently even if they still can and want to work. This can lead to low income and reduced social engagement. Governments and employers can help create an environment that supports job retention and a return to work in such situations. This report looks at one critical policy lever: the role of paid sick leave and sickness benefits in protecting workers’ health, jobs and incomes. Korea is among the very few OECD countries without statutory social protection for sick workers and is currently considering closing this gap in its welfare system. This report provides an overview of key features of sickness insurance systems in OECD countries and draws policy lessons for Korea to introduce equitable and adequate social protection for sick workers with a robust return-to-work component and financially sustainable payments that encourage employer involvement.