RE:Investor or Traderthe concept of alarms in business is an issue business owner are ready to keep doors open when they are infested causing less and less ppl ready to go out the concept of a green light in hvac filers systen showing air is clean is a sound plan covid kill appx 5-10% ppl it infects the slowdown was made possible only by shutting down everything its not common flu its 1000 to 10 000 + more mortal and more virulent than common flu if you can detect the virus in air while asymptomatic ppl are spreading it you can save lives with data tracking this tech can also be ported to other type of airborn problems its not 100 based on covid