| response to poliomyelitis in peru. | in 1991, confirmed polio cases were reported in the americas only from peru (1 wild-type 1 poliovirus) and colombia (6 wild-type 1 poliovirus) [see front page of this issue]. 1 other wild-type 1 poliovirus was isolated from a case of acute flaccid paralysis in peru with onset of paralysis in december 1990. the response to the confirmed cases in colombia was to target more that 1 million households in the risk area for mop-up vaccination campaigns. approximately 80% of the children under 5 yea ... | 1992 | 12285228 |