There is irrefutable proof, not just now, but going back decades that UV-C effectively inactivates and destroys all known microbes.
The Scientist behind The World Health Organisation announcement in July that Covid transmission can be via the air, echoes sentiments of our own Chief Scientific Officer, Sir Patrick Vallance who has also talked starkly about the Autumn and Winter ahead, “the implications are profound—but not that hard to grasp,” says Donald Milton,
Donald Milton an aerobiology expert at the University of Maryland and one of the authors who spearheaded the letter to WHO. “We need to subsidise bars and restaurants to stay closed. We need to increase ventilation where we can and start making as widespread as possible use of air sanitation with upper-room germicidal UV and maybe far UV in those places that must be open, like elementary schools. We need to stagger hours of starting work and keep density on public transport low, or open windows. And we need to wear masks.