Cellulose nanofiber paper filtration system removes virus contaminants with high efficiency Researchers in the Division of Nanotechnology and Functional Materials, Uppsala University are suffering from a paper filter, that may remove virus contaminants with the performance matching that of the best industrial virus filter systems. The paper filter consists of completely high purity cellulose nanofibers, directly derived from nature common info . The illustration displays the nanofibers in white and the virus in green. Virus particles are very peculiar objects – small yet mighty. Infections can only replicate in living cells but after the cells become contaminated the viruses can change out to be extremely pathogenic.