IN 1993, the World Health Organisation (WHO) declared tuberculosis (TB) a global public health emergency. It urged nations to coordinate efforts to avert millions of deaths. Author RICHARD E. CHAISSON, Director, Center for Tuberculosis Research, Johns Hopkins University In January 2020, the WHO declared COVID-19, another airborne infectious disease, a public health emergency of international concern. The similarity between the global responses to these two pandemics ends there. The scientific, public health, medical, and pharmaceutical communities’ responses to COVID-19 in the past two years has been spectacular. Within two weeks of declaring COVID-19 a global emergency, the WHO had convened…