I'm inclined to agree. I struck up a conversation with a epidemiologist at a party once. He worked for GE designing water filters. I commented on how I just had

I'm inclined to agree. I struck up a conversation with a epidemiologist at a party once. He worked for GE designing water filters. I commented on how I just had to find a backpacking filter that could eliminate Viruses .018 micron + in size. Most wilderness medicine professionals now recommend treating water for viruses as well as bacteria and protozoa. Viruses must be eliminated through a purification system or boiling because they are small enough to pass through a filter. He was clueless and had nothing meaningful to add to the conversation and actually told me "that was new info to him."