Question: There is a machine called a hemopurifier – like a dialysis machine but it uses antibodies in a filter to remove viruses from blood. Have you looked into this, and if so might it be a way to help people with one or more chronic viral infections instead of or in addition to antivirals? Friday they even announced the machine could filter “melanoma-derived exosomes” from “cell culture fluids” (97% in two hours). Any thoughts on all this? Reply: This general approach to remove viruses is reasonable, if the antibodies available are good enough to actually catch the virus particles as they pass through the filter, and if the filter does not destroy the blood cells as they pass through the filter.. Thus it might be good enough to remove viruses and some bacteria from stored blood (see comments on another post about cleaning up viruses from blood and blood products), but it would not do anything about the viruses and bacteria inside tissues where they do their damage to cells. Thus as a method to remove pathogens from stored blood, it could be certainly useful, but as a method to treat pathogens deep inside tissues it would probably not work all that well.