Ions At News Today

In pakistan make it hard to reach children there who need it most. polio may not be seen in the u.s. today, but its only a plane flight away. >> it does not take much for the virus to get to another continent. if it finds a pool of unimmunized children, it will spread. >> reporter: why did you vaccinate your children? she tells me she worries about polio and she should. until polio is wiped out everywhere, her children and ours remain at risk. dr. richard besser, abc news, india. >> literally, t...