Air Doctor Considered one of the most powerful antimicrobial agents, chlorine dioxide creates an atmospheric shield of protection against germs, viruses, bacteria, pollen, and odors. Here are the Features & Benefits: POWER OF CIO2 Research has shown that when used in appropriate concentrations, chlorine dioxide gas eliminates microbial contaminants and viruses that are highly contagious and potentially deadly. INDUSTRY STANDARD Chlorine dioxide gas has been safely used in hospitals and other healthcare environments for sterilizing medical equipment, laboratories, surfaces, rooms, and other medical items. 30 DAY PROTECTION The patented Air Doctor Portable (clip-on) eliminates microbes by slowly and continuously releasing ClO2 gas into the atmosphere around you for 30 days.