World TB Day is March 24, which marks the day in 1882 when Dr. Robert Koch announced his discovery of the bacterium that causes TB – Mycobacterium tuberculosis – opening the way towards diagnosing and curing this disease. Despite being preventable and treatable, TB is still one of the world’s deadliest infectious diseases, second only to COVID-19 in 2020. This year the theme of World TB Day is “Invest to End TB. Save Lives”, reflecting the urgency to invest resources to end the global TB epidemic by 2030.