[A survey on polio paralysis in Shandong Province Department of Program Immunization, Cooperation Group on the Survey of Polio Paralysis].
The survey was conducted in four counties where Polio consistently occurred during 1986-1988. According to the survey, there were 251 polio cases from 1974 to 1989, of which only 138 cases were reported. The paralytic rate by polio in the population under 15 years old was 0.486%. The survey also showed that polio was still a severe disease which paralysed children in the country. The number of polio cases accounted for 48% of all paralytic persons. Legs were the chiefly affected limbs, being about 90%. From analysis of vaccine history of polio cases, we found that the difference between two groups was highly significant. 90% of polio cases had no vaccine history or no full vaccine history. The reason for this was mainly due to lack of related knowledge. In addition, we also analysed multiple birth factor, which seemed to be not significant.