When a disease becomes "endemic," it may still cause suffering and death -- as malaria and tuberculosis do, for example. Dr Mike Ryan explains that even if COVID-19 becomes endemic, it will remain important to reduce infections, suffering and death. | World Health Organization (WHO)

The ancient Greeks knew its effects as phthisis; the Incans called it chaky oncay; and the English called it tuberculosis. Today TB causes more deaths than malaria or even HIV and AIDS. How has it persisted for so long? | TED-Ed