Community-based survey to assess seroprevalence of poliovirus antibodies in far-north Cameroon in 2020

Poliovirus antibodies following two rounds of campaigns with a type 2 novel oral poliovirus vaccine in Liberia: a clustered, population-based seroprevalence survey

“…27 Seroprevalence surveys with similar study designs have been implemented recently in Cameroon and Chad. 28 , 29 In Cameroon in 2020, a higher seroprevalence was documented against poliovirus type 1 (87%) and type 3 (79%), while the estimated coverage for third dose bOPV and IPV were similar to those in our study (70% and 69%, respectively). 28 Similarly in Chad, in 2019, the seroprevalences against type 1 (91%) and type 3 (83%) were higher than those in our study, with lower third dose bOPV (47%) and IPV (49%) coverage.…”

“… 28 , 29 In Cameroon in 2020, a higher seroprevalence was documented against poliovirus type 1 (87%) and type 3 (79%), while the estimated coverage for third dose bOPV and IPV were similar to those in our study (70% and 69%, respectively). 28 Similarly in Chad, in 2019, the seroprevalences against type 1 (91%) and type 3 (83%) were higher than those in our study, with lower third dose bOPV (47%) and IPV (49%) coverage. 29 However, population immunity is also attributable to supplementary immunisation activities, the frequency of which differs from country to country.…”

Poliovirus serological assay after the cVDPV1 outbreak in Papua New Guinea: a cross-sectional study from 2020 to 2021

“…Other studies highlight that good sanitation is an important factor in controlling the transmission by associating seropositivity with the type of toilet used, however we have not observed documented association with source of drinking water. 19 , 22 …”