Addressing comorbidities and risk factors for tuberculosis (TB) is a crucial component of the World Health Organization (WHO)’s End TB Strategy. This WHO operational handbook on tuberculosis. Module 6: tuberculosis and comorbidities aims to support countries in scaling up people-centred care, based on the latest WHO recommendations on TB and key comorbidities, and drawing upon additional evidence, best practices and inputs from various experts and stakeholders obtained during WHO processes. It is intended for use by people working in ministries of health, particularly TB programmes and the relevant departments or programmes responsible for comorbidities and health-related risk factors for TB such as HIV, diabetes, undernutrition, substance use, and tobacco use, as well as programmes addressing mental health and lung health.