For example, in 2011 adolescent vaccination led to a greater than 70 percent reduction in infant hospital cases.

比如，2011年青少年疫苗令幼儿住院病例数减少了70%多。

Only about 12.8 percent of Quebec residents are not vaccinated, but they make up nearly a third of all hospital cases.

魁北克只有约12。8%的居民没有接种疫苗，但是在住院病例中，未接种疫苗者却占据了近三分之一。