1 ene 1894 año - First Major Polio Outbreak in USA recorded
Descripción:
 The first major documented polio outbreak in the United States occurs in Vermont; 18 deaths and 132 cases of permanent paralysis are reported.
https://www.endpolio.org/rotary-and-the-fight-against-polio 
Añadido al timeline:
fecha:
1 ene 1894 año
Ahora mismo
 ~ 131 years ago