Because I cannot verify antiviral testing, I can't give a five.
Arrived quickly, dispenses drops easily into diffuser....<br />  Has a bit of a medicine smell, like a mix of eucalyptus and tea tree but mixes well to be hidden with lavender or other EOs. I purchased for antiviral properties... No way for me to test that, didn't even use continuously, I can say so far, (knocking wood), no one in household has gotten sick.
Rating: 4 stars