Al-hadyan, khaled, Alsbeih, G.A. , Al-Harbi, N.M. , Bin Judia, S.S. , Al-Ghamdi, M.M. , Al-Ghamdi, S.M. , Moftah, B.A. and S. Alhmaid, R. 2021. Filtration efficiency of face masks and veils as protective measures during COVID-19 pandemic. Kuwait Journal of Science. 49, splcov (Dec. 2021). DOI:https://doi.org/10.48129/kjs.splcov.13629.