This striking airmail issue from Paraguay (1962) was released in support of the World Health Organization’s (W.H.O.) malaria eradication campaign. The design features the Anopheles darlingi mosquito, the primary vector of malaria in South America, shown against the United Nations emblem, with a microscope symbolizing medical research. The bold red “REPÚBLICA DEL PARAGUAY” heading contrasts against the olive-green background, making it a highly visual thematic piece. Printed by De La Rue de Colombia, it highlights Paraguay’s contribution to global health initiatives of the era. A desirable issue for collectors of topical malaria, WHO, UN, and medical themes.