The following article from the Journal of Occupational and Environmental Hygiene makes a compelling case for adding HEPA filtration to indoor environments in order to greatly reduce the chance of Covid spread.

The article has a couple of important points.

Based on their model, an office worker has a 40% chance of contracting Covid when sharing an office with an infected worker “Even with use of N95 masks in this scenario” after 1 week of exposure !

By combining HEPA filtration (12 Air Change per Hour – 12 ACH), the probability of contracting Covid from the office environment over a 6 month period drops to 0.003%.

Publication Cover

Conclusion: Use HEPA filtration in indoor environments in this time of panemic, and continue to use to avoid other airborne pathogens.