AirDoctor Portable Home Virus Blocker is intended to clean the air and remove the smallest microbes that not only include cold and flu viruses but also dust, pollen, etc. The key ingredient of this product is chlorine dioxide that has bactericidal and disinfecting properties. This virus blocker cleans up to 25 m3. It is extremely easy to use and effectively cleanses the air of mold, fungus, and bacteria. AirDoctor Portable Home Virus Blocker is a must-have in the height of the cold and flu season. It has passed the quality control test and is approved for sale.