Design optimization and validation of UV-C illumination chamber for filtering facepiece respirators oleh Abu S.M. Mohsin, Mohd. Raeed Jamiruddin, Md Mahmudul Kabir Peyal, Shahana Sharmin, Ashfaq Ahmed, Afrin Hossain Puspita, A.A.M. Sharfuddin, Afrida Malik, Al Hasib, Sanjida Akter Suchona, Arshad M. Chowdhury, Eva Rahman Kabir