Reading Time: 5 minutesMost people living in cities spend 90% of their time inside buildings, where they're surrounded by viruses, bacteria, molds, and other microbes. Scientific reports published by the NIH show essential oils can reduce the amount of virus by 53%. This group of organisms, called the indoor microbiome, mostly comes from us and our pets, but also includes microbes from outside that we bring in, water from our plumbing, soil, and from the air conditioning or heating systems.