Ultraviolet light can reduce Covid transmission indoors

One of the biggest questions facing us these days is how we can make our indoor spaces safe from Covid-19 contagion. Studies have shown that we are far more likely to catch the virus in closed indoor spaces like offices, schools, public transport, museums and health centers rather than outdoors.

A team of international scientists,including Prof. Ido Kaminer of the Technion-Israel Institute of Technology, studied various methods to prevent coronavirus contagion in indoor spaces, and based on their findings, recently published in ACS Nano, advocate the use of ultraviolet light as a “particularly efficient, easily deployable, and economically affordable” way to inactivate the virus. The experts, from the fields of virology, immunology, aerosols, architecture, and physics, researched currently available UV-C sources, such as fluorescent lamps, microcavity plasmas, and LEDs. They concluded that by applying this type of light on the inside of the ventilation systems of buildings and in shared indoor spaces while not in use, it will be possible to quickly and efficiently deactivate both airborne and surface-deposited SARS-CoV-2 viruses. The team also explored the cost of deploying such a technology and argue that a global capital investment of a few billion dollars in UV-C sources could protect more than a billion indoor workers worldwide. “The COVID-19 outbreak, caused by the SARS-CoV-2 virus, is posing an extraordinary challenge that requires swift worldwide action for the massive deployment of affordable and ready-to-apply measures to drastically reduce its transmission probabilities in indoor spaces,” the report said.-- More...