Assessment of the Particle Filtration Efficiency of N95 Masks Protecting Quarry Workers in Erongo, Otjozondjupa, and Kunene Regions of Namibia: DOI: https://dx.doi.org/10.4314/ajhs.v38i1.5. AJHS. 2025;38(1). Accessed November 12, 2025. https://ojs.ajhsjournal.or.ke/index.php/home/article/view/637