This commemorative stamp from Guinea honors the centenary of the discovery of the tuberculosis bacillus by German scientist Robert Koch, one of the pioneers of modern bacteriology. The design shows a laboratory scene symbolizing medical research, alongside the international symbol of the fight against tuberculosis. Issued to highlight global efforts in disease control, the stamp reflects both scientific achievement and public health awareness. Such thematic medical and scientific stamps are appreciated by collectors interested in medicine, history of science, and global health campaigns.