[A comparison of the effectiveness of mass immunization campaign of trivalent oral poliovirus vaccine (TOPV) by epidemiological serosurvey. Shandong Collaborating Group for Poliomyelitis Control and Surveillance, Jinan, Shandong].

In order to evaluate the effect of TOPV mass immunization campaign, 902 serum samples from two counties of Shandong province were assayed by micro-neutralization test for the neutralization antibodies against poliovirus. The results showed that among children of 0 to 9 year-old groups, the antibody-positive rates and geometric mean titres (GMTs) with poliovirus type 1 to 3 after mass immunization campaign were significantly higher than those before the campaign, respectively. The author considers that it is necessary for poliomyelitis eradication to carry out TOPV mass immunization campaign on the basis of EPI routine immunization.