The World Health Organization now has plans to make measles, rubella (German measles), polio and neonatal tetanus, all of which have effective vaccines, disappear from the world by the early 21 st century.
繼天花之後，世界衛生組織並計畫，在二十一世紀初讓已有有效疫苗防治的「三麻一風」（麻疹、德國麻疹、小兒麻痺、新生兒破傷風）也銷聲匿跡。