For scalable antibacterial treatment utilizing PDI, cationic porphyrin (Por(+)) conjugated cellulose was used as paper . Using visible light with a wavelength and power of 400-700 nm and 65-5 mW/cm 2 , respectively, Por(+)-the modified cellulosic paper was irradiated for 30 minutes. Acinetobacter baumannii, P. aeruginosa, Klebsiella pneumoniae, vancomycinresistant Enterococcus faecium (VER), S. aureus, and other bacteria and viruses were tested for antibacterial and antiviral efficacies. For every species that was looked at, such as bacteria and viruses, the inactivation efficiencies were more than 99.9% .