1991 – Last Wild Polio Case in the Americas:

In 1991, the Americas achieved a significant milestone in the fight against polio with the last reported case of wild polio. This accomplishment demonstrated the effectiveness of widespread vaccination efforts and paved the way for continued global initiatives aimed at eradicating polio altogether. The Americas became the first region in the world to eliminate the transmission of wild poliovirus, inspiring ongoing efforts in other parts of the globe.