DetroitdaveThe reason for my initial comment is because that statement in the description is blatantly FALSE.
It is a warning to people to NOT purchases this product if they want/need removal or neutralization of viruses.
allentThe bacterial and protozoan levels are correct. Most viruses are much smaller than bacteria or protozoa and will pass through a filter. There are a few very large viruses that can be filtered, and likely they are using those viruses for their claims.