Here's a company which produces biomarkers (which it can disperse as aerosols or via other means) which it can then detect in air or other samples: https://www.

Here's a company which produces biomarkers (which it can disperse as aerosols or via other means) which it can then detect in air or other samples: https://www.safetraces.com/ https://www.safetraces.com/ (I have no commercial connection with them.)