Acuted flaccid paralysis surveillance in Viet Nam, 2015 - 2019

Abstract

The study describes activities and the results of acuted flaccid paralysis (AFP) surveillance system during the period of 2015
- 2019. Study subjects were all children under 15 years old with AFP who were recorded in AFP surveillance software of the National Polio Surveillance Board. The results showed  that the incidence of AFP/100.000 children under 15 years old and the proportion of AFP with adequate 2 stool specimens exceeded the target of WHO during 2015 - 2019. AFP almost happened among children under 5 years old (81.2%). The frequency of AFP was found to be higher among boys (58.9%) than girls
(41.1%). More than 90% of AFP cases were received at least 3 doses of oral polio vaccine (OPV). No wild polio virus was isolated from AFP cases’ stools, 12% of AFP cases were identifed as non-polio enterovirus. Viet Nam continues to maintain the high quality of AFP surveillance system within 2015 - 2019. This surveillance system needs to maintain its quality, actively search for AFP cases to ensure no omitting cases and strengthen immunization activities to continuously protect the results of polio eradication in the next stages.