Pakistan : They were arrested for having supported a polio vaccination campaign , he says . ` What we have heard is that that 's not the case . '' The case is in the volatile tribal Khyber Agency . Pakistan is the sole country in the world where cases so far this year exceed last year 's toll .
Pakistan : They were arrested for having supported a polio vaccination campaign , he says . The case is in the volatile tribal Khyber Agency . Pakistan is the sole country in the world where cases so far this year exceed last year 's toll .