Polio vaccination coverage in the Sindh region of Pakistan was evaluated to above 90 per cent, said World Health Organisation sources. A preliminary statistical assessment of 30 clusters of houses has shown that the polio coverage, conducted by the Sindh health department during the five Sub-national Immunisation Days, was better than the one conducted on the two National Immunisation Days during December last year. An estimated 17 million children under the age of five were targeted for vaccination.