World Cuba Will Reach ‘Full Immunization’ By Dec. 31, Leader Tells U.N. September 23, 2021September 23, 2021RICK GLADSTONEComments Off on Cuba Will Reach ‘Full Immunization’ By Dec. 31, Leader Tells U.N. The vaccines developed in Cuba, which have yet to receive W.H.O. approval, are being administered to adults and children as young as 2.