• COVID-19 is the respiratory disease caused by the SARS-CoV-2 virus that has caused outbreaks worldwide. The SARS-CoV-2 is a new variant in the betacoronavirus family (Fisher 2020).
  • COVID-19 is a small, single-stranded RNA virus that makes it much easier to inactivate in comparison to mold or any sporicidal pathogen. 

“The inactivation rates of the small RNA viruses, poliovirus 1, and coxsackievirus B4, by low pressure UV were very rapid and reached approximately 4 log and greater than 5 log, respectively, within a UV dose of 30 mJ/cm2.” – Environmental Protection Agency


  • UVC probably destroys the novel coronavirus, but we need to learn more.
  • UVC  has been found to destroy viruses and other microbes on surfaces.
  • The U.S. government and the UV technology industry are working to define standards for UV disinfection technologies in healthcare settings.
  • Most UV sanitizers have not been tested against the novel coronavirus, SARS-CoV-2, but UVC  has been shown to destroy related coronaviruses, including the one that causes the disease MERS.



DOSE (Log 1) 



.7 mJ/cm2 

Berne virus (Coronaviridae)

.7 mJ/cm2 

Murine Coronavirus (MHV)

1.5 mJ/cm2 

Canine Coronavirus (CCV)

2.9 mJ/cm2 

Murine Coronavirus (MHV)

2.9 mJ/cm2 

SARS Coronavirus CoV-P9

4.0 mJ/cm2 

Murine Coronavirus (MHV)

10.3 mJ/cm2 

SARS Coronavirus (Hanoi)

13.4 mJ/cm2 

SARS Coronavirus (Urbani)

24.1 mJ/cm2 


6.7 mJ/cm2 

Kowalski, Wladyslaw & Walsh, Thomas & Petraitis, Vidmantas. (2020). 2020 COVID-19 Coronavirus Ultraviolet Susceptibility. 10.13140/RG.2.2.22803.22566.