And it’s as unique to you as your fingerprints.

Each of us sheds around 24 million biological particles into the air and surfaces around us each day – everything from bacteria to viruses and spores. That’s one million particles per hour!

Microbial clouds aren’t news to scientists. However, a recent study has found that the makeup of the biological particles we emit is totally unique. Within only a few hours in one location, the air and surfaces around you become populated with microscopic organisms that leave a specific biological marker of your presence. This finding could have major impacts on fields ranging from epidemiology to criminal forensics!

Learn more about your microbial cloud from TIME Magazine.