“School-based immunization is a strategy for reaching older children and adolescents,” Health Secretary Francisco T. Duque III said. "It is a platform to provide second opportunity for vaccination and an excellent platform integrates other public health interventions like mass deworming.” The DOH’s school-based immunization program aims to reach more children, especially with the yearly increase in the number of enrollees. School-based immunization was piloted in 2013 in selected provinces and cities nationwide. In August 2015, the DOH, in collaboration with Department of Education (DepEd) and the Department of Interior and Local Government (DILG), successfully conducted vaccination in 38,688 public schools nationwide providing a second dose for measles and booster doses for diphtheria and tetanus. This became a yearly activity since 2015 when August was declared School-Based Immunization month.