{"id":15037,"date":"2025-12-02T14:26:41","date_gmt":"2025-12-02T13:26:41","guid":{"rendered":"https:\/\/www.bluesquarehub.com\/?p=15037"},"modified":"2026-02-16T14:10:31","modified_gmt":"2026-02-16T13:10:31","slug":"renforcer-planification-vaccination-approche-fondee-donnees","status":"publish","type":"post","link":"https:\/\/www.bluesquarehub.com\/fr\/renforcer-planification-vaccination-approche-fondee-donnees\/","title":{"rendered":"Renforcer la planification de la vaccination au Cameroun : une approche fond\u00e9e sur les donn\u00e9es"},"content":{"rendered":"\n

Des donn\u00e9es d\u00e9mographiques exactes et \u00e0 jour <\/strong>sont essentielles pour allouer correctement les ressources et planifier efficacement les campagnes de vaccination<\/a><\/strong>, y compris celles ciblant la rougeole et la rub\u00e9ole. Des chiffres obsol\u00e8tes peuvent entra\u00eener des objectifs manqu\u00e9s, des communaut\u00e9s sous-vaccin\u00e9es et un gaspillage de ressources. Au Cameroun, Bluesquare a mis \u00e0 profit son expertise en mod\u00e9lisation d\u00e9mographique<\/strong> et en analyse de donn\u00e9es<\/strong> pour d\u00e9velopper des m\u00e9thodes innovantes d\u2019estimation de la population cible pour la digitalisation des campagnes, soutenant ainsi la strat\u00e9gie nationale de vaccination du PEV.<\/p>\n\n\n\n

Le d\u00e9fi principal : estimer la taille de la population<\/h2>\n\n\n\n

Pour une planification efficace de la vaccination<\/strong> au Cameroun, le Programme \u00c9largi de Vaccination (PEV)<\/a> doit conna\u00eetre l\u2019emplacement des populations cibles. Cependant, cela est difficile car le dernier recensement g\u00e9n\u00e9ral remonte \u00e0 2005, et ses donn\u00e9es, vieilles de 20 ans, ne refl\u00e8tent plus fid\u00e8lement la distribution d\u00e9mographique actuelle. Ces derni\u00e8res ann\u00e9es, l\u2019instabilit\u00e9 r\u00e9gionale, la mobilit\u00e9 interne et l\u2019urbanisation rapide ont entra\u00een\u00e9 d\u2019importants mouvements de population. Le Cameroun accueille \u00e9galement un grand nombre de r\u00e9fugi\u00e9s et de personnes d\u00e9plac\u00e9es internes, souvent int\u00e9gr\u00e9s dans les communaut\u00e9s locales, ce qui complique leur estimation. Ces \u00e9carts introduisent des biais significatifs dans l\u2019estimation des populations cibles, affectant la pr\u00e9cision des calculs de couverture vaccinale<\/strong> et l\u2019allocation des ressources<\/strong>.<\/p>\n\n\n\n

Croiser diff\u00e9rentes sources de donn\u00e9es<\/h2>\n\n\n\n

Dans les contextes o\u00f9 les chiffres de population sont difficiles \u00e0 obtenir, les programmes nationaux de sant\u00e9 peuvent d\u00e9sormais utiliser des estimations issues de divers mod\u00e8les d\u00e9mographiques<\/strong>. En particulier, WorldPop<\/a>, de l\u2019universit\u00e9 de Southampton, est un acteur acad\u00e9mique majeur produisant des cartes d\u00e9mographiques haute d\u00e9finition pour guider les interventions de sant\u00e9 publique<\/strong>. Mais au Cameroun, la derni\u00e8re estimation de WorldPop date de 2022, cr\u00e9ant un \u00e9cart de quatre ans avec les objectifs de vaccination pour 2026.<\/p>\n\n\n\n

Dans l\u2019intervalle, Bluesquare a soutenu la digitalisation des micro-recensements<\/strong> r\u00e9alis\u00e9s lors de diverses campagnes de vaccination<\/strong> entre 2023 et 2024. Les micro-recensements sont des d\u00e9nombrements m\u00e9nagers effectu\u00e9s avant les campagnes pour pallier le manque de donn\u00e9es pr\u00e9cises sur les populations cibles<\/strong>. Les enqu\u00eateurs se rendent dans les zones concern\u00e9es et collectent des donn\u00e9es d\u00e9taill\u00e9es sur les m\u00e9nages et leur composition. Depuis 2023, ces micro-recensements sont rassembl\u00e9s via l\u2019outil num\u00e9rique de micro-planification IASO Cameroon Collect\u00ae<\/a><\/strong>, d\u00e9velopp\u00e9 par Bluesquare.<\/p>\n\n\n\n

En collaboration avec le PEV et GAVI, nous avons identifi\u00e9 une opportunit\u00e9 de maximiser la valeur de ces donn\u00e9es digitalis\u00e9es. Nous avons d\u00e9cid\u00e9 de collaborer avec WorldPop afin d\u2019utiliser les donn\u00e9es issues des micro-recensements de campagne et des technologies g\u00e9ospatiales pour cr\u00e9er des estimations d\u00e9mographiques actualis\u00e9es<\/strong> et \u00e0 haute r\u00e9solution. Au fur et \u00e0 mesure que ces micro-recensements sont collect\u00e9s, il devient possible de mettre \u00e0 jour les estimations cartographiques produites par WorldPop et de fournir une vision plus r\u00e9cente de la distribution de la population \u00e0 travers le territoire.<\/p>\n\n\n\n

Sous la supervision du PEV et avec le financement de GAVI, nous avons travaill\u00e9 avec les \u00e9quipes de WorldPop afin qu\u2019elles puissent int\u00e9grer les donn\u00e9es de micro-recensement<\/strong> les plus r\u00e9centes collect\u00e9es au Cameroun et produire des cartes d\u00e9mographiques actualis\u00e9es <\/strong>avant la planification strat\u00e9gique <\/strong>de 2026. Les \u00e9quipes de WorldPop ont incorpor\u00e9 ces nouvelles informations pour mettre \u00e0 jour leurs estimations des populations g\u00e9olocalis\u00e9es sur tout le territoire camerounais, selon un ensemble de groupes d\u2019\u00e2ge pertinents pour les activit\u00e9s du PEV.<\/p>\n\n\n\n

Ajouter une couche d\u2019analyse pour optimiser l\u2019estimation des cibles vaccinales<\/h2>\n\n\n\n

Apr\u00e8s r\u00e9ception de ces mises \u00e0 jour, Bluesquare a pu r\u00e9aliser des analyses compl\u00e9mentaires en combinant les estimations r\u00e9vis\u00e9es de population avec les donn\u00e9es de surveillance <\/strong>de la rougeole et les activit\u00e9s de vaccination. Cela a permis d\u2019aider le PEV \u00e0 prioriser les districts et les groupes d\u2019\u00e2ge cibles pour les campagnes, ainsi qu\u2019\u00e0 estimer le nombre de vaccins \u00e0 pr\u00e9voir.<\/p>\n\n\n\n

<\/p>\n\n\n

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\"Graphique<\/figure>\n<\/div><\/div>\n\n\n\n
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\"Graphiques<\/figure>\n<\/div>\n<\/div>\n\n\n

Visuels : graphique d\u2019incidence de la rougeole et cartographie – R\u00e9sultats provisoires<\/em><\/p>\n\n\n\n

Une seconde dimension du projet a consist\u00e9 \u00e0 cartographier le risque d\u2019\u00e9mergence d\u2019\u00e9pid\u00e9mies de rougeole<\/strong>, en fournissant des informations sur les \u00e9l\u00e9ments qui augmentent ou r\u00e9duisent ce risque. En utilisant l\u2019approche d\u2019\u00e9valuation des risques de l\u2019OMS<\/a>, nous avons g\u00e9n\u00e9r\u00e9 des cartes \u00e9valuant les aires de sant\u00e9 <\/strong>selon plusieurs dimensions, telles que le nombre de districts voisins ayant des cas de rougeole, la rapidit\u00e9 de confirmation des cas, ou les taux de vaccination des populations.<\/p>\n\n\n

\n
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\"\"<\/figure>\n<\/div>\n\n\n\n
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\"\"<\/figure>\n<\/div>\n\n\n\n
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\"\"<\/figure>\n<\/div>\n<\/div>\n\n\n

Visuels : exemple de dimensions de cartographie du risque – R\u00e9sultats provisoires<\/em><\/p>\n\n\n\n

L\u2019effort de cartographie d\u00e9mographique<\/strong> a permis d\u2019obtenir une solide preuve de concept (POC) pour la mise \u00e0 jour continue des cartes de population<\/strong> en utilisant les donn\u00e9es des campagnes<\/strong> et la mod\u00e9lisation g\u00e9ospatiale<\/strong>. Les donn\u00e9es d\u00e9mographiques actualis\u00e9es ont permis au PEV de planifier les campagnes de vaccination \u00e0 venir. Ces estimations seront int\u00e9gr\u00e9es \u00e0 la plateforme IASO<\/a> pour pr\u00e9-remplir les formulaires de micro-planification, facilitant directement l\u2019organisation des futures campagnes.<\/p>\n","protected":false},"excerpt":{"rendered":"

Des donn\u00e9es d\u00e9mographiques exactes et \u00e0 jour sont essentielles pour allouer correctement les ressources et planifier efficacement les campagnes de vaccination, y compris celles ciblant la rougeole et la rub\u00e9ole. Des chiffres obsol\u00e8tes peuvent entra\u00eener des objectifs manqu\u00e9s, des communaut\u00e9s sous-vaccin\u00e9es et un gaspillage de ressources. Au Cameroun, Bluesquare a mis \u00e0 profit son expertise […]<\/p>\n","protected":false},"author":4,"featured_media":15039,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","editor_plus_copied_stylings":"{}","footnotes":""},"categories":[186],"tags":[195],"class_list":["post-15037","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-digitalisation-campagnes","tag-vaccination"],"acf":[],"yoast_head":"\nPlanification de la vaccination : l'approche fond\u00e9e sur les donn\u00e9es - Bluesquare<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les m\u00e9thodes innovantes de Bluesquare, expert en mod\u00e9lisation d\u00e9mographique et analyse de donn\u00e9es, pour estimer la population cible.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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