• According to the United States Environmental Protection Agency (EPA), indoor air can be five times as polluted as outdoor air. Since indoor air is not circulated as much as outside air, many airborne pollutants continue to thrive inside.
•  CCDC recommends as part of a layered approach using portable high-efficiency particulate air (HEPA) fan/filtration systems to help enhance air cleaning (especially in higher risk areas such as a nurse’s office or areas frequently inhabited by persons with increased risk of getting COVID-19).

The World Health Organization warned
Wednesday that new coronavirus variants could emerge during the pandemic that
render the current vaccines useless.

SARS-CoV, MERS-CoV, influenza,
measles, and the rhinoviruses that cause the common cold can all spread via aerosols that can build up in indoor air and linger for hours. Over the last century and at the beginning of this pandemic, it was widely believed that respiratory viruses, including SARS-CoV-2, mainly spread through droplets produced in coughs and sneezes of infected individuals or through touching contaminated surfaces.

CDC recommends a layered strategy to reduce exposures to SARS-CoV-2, the virus that causes COVID-19
CDC - Ventilation interventions can help reduce the number of infectious viral particles (e.g., SARS-CoV-2) in the air.

Coronavirus Stable for Hours to 3 Days on Surfaces The virus that causes coronavirus disease 2019 (COVID-19) is stable for several hours to days in aerosols and on surfaces, according to a new study from National Institutes of Health, CDC, UCLA and Princeton University scientists in The New England Journal of Medicine.
The scientists found that severe acute respiratory syndrome coronavirus
was detectable in aerosols for up to three hours, up to four hours on copper, up to 24 hours on cardboard and up to two to three days on plastic and stainless steel.

Standard UVC is ultraviolet light with a wavelength of 250 nanometres. This high frequency wavelength light kills bacteria and viruses. Standard UVC is ultraviolet light with a wavelength of 250 nanometres This high frequency wavelength light kills bacteria and viruses and has been used extensively for more than 40 years in disinfecting drinking water, wastewater, air, hospitals, pharmaceutical products, and surfaces against a whole suite of human pathogens.