SEMI-ANALYTIC SOLUTION OF MATHEMATICAL MODEL OF DISEASE DYNAMICS IN SCHOOL USING HOMOTOPY PERTURBATION METHOD (HPM). FJS [Internet]. 2024 Nov. 27 [cited 2025 Sep. 12];8(6):44-9. Available from: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/2703