For Public & Private Secondary Schools: Winners for the Best Implementor of Dengue Vector Surveillance NCR through the Ovilarvicidal (OL) Trap Program & Participants for the OL TRAP Poster-Slogan Making Contest Posted on December 29, 2014 by MSM13 Leave a comment 1402. Winners for the Best Implementor of Dengue Vector Surveillance NCR through the Ovilarvicidal (OL) Trap Program & Participants for the OL TRAP Poster-Slogan Making Contest Memorandum