This striking airmail stamp from Paraguay highlights the global campaign to combat malaria, a major international health initiative of the mid-20th century. The design features the World Health Organization emblem—a serpent-entwined staff over a globe—combined with a mosquito, symbolizing the fight against the malaria-carrying insect. The Spanish inscription “El Mundo Unido Contra la Malaria” translates to “The World United Against Malaria.” Issued for Correo Aéreo (airmail) use with a denomination of 4 Guaraníes, the stamp reflects Paraguay’s participation in worldwide public health efforts and malaria eradication campaigns.