NVIGOREA AB commercialises the world's first nanocellulose-based filter paper that is capable of sifting away all types of viruses from protein solutions, cell culture media, or water in principle as easily as brewing coffee. Meticulously tailored pore size distribution ensures high separation efficiency to achieve high virus clearance without valuable protein losses. While the concept of particle separation based on size differences might appear straightforward, achieving this feat at the nanoscale level is an intricate challenge. Our technology represents years of dedicated research, specialized expertise, and technological advancement in the field of nanofiltration, making this innovation truly remarkable in the biotechnology sector.