Durante el periodo del 1 de enero de 2012 al 17 de octubre de 2012, ha habido 171 casos de Polio en el Mundo.
During the period 1 Jan 2012 to 17 Oct 2012, there have been 171 cases of polio in the world.
During the period 1 Jan 2012 to 17 Oct 2012, there have been 171 cases of polio in the world.
