This commemorative stamp from Paraguay, issued on April 7, 1962, marks World Health Day organized by the World Health Organization (W.H.O.). With a denomination of ₲1.00, the design highlights global health awareness by depicting the Anopheles darlingi mosquito (a malaria vector), its eggs under magnification, and a scientific microscope symbolizing research and disease prevention. Printed by De La Rue de Colombia and designed by Mosdóssy, this issue reflects the worldwide effort to combat malaria and tropical diseases during the mid-20th century. A historically significant piece for collectors of thematic stamps on medicine, health, and entomology.