Issued by the République Populaire Révolutionnaire de Guinée, this 25 sylis commemorative stamp marks the 100th anniversary of Dr. Robert Koch’s groundbreaking discovery of the tuberculosis bacillus in 1882. The design depicts a physician examining a young patient with a stethoscope, symbolizing the fight against tuberculosis. A red double cross of Lorraine, the international symbol of the anti-tuberculosis movement, is prominently featured. This issue reflects Guinea’s participation in global public health awareness through philately. A significant medical thematic item for collectors of health and science stamps.