By the way, Japanese electronic equipment maker "Sharp" stated in 2004 that they found their "Plasmacluster Ion Air Cleaner" destroys some kind of Corona Virus.
URL is https://jp.sharp/plasmacluster-tech/.../04072701.html
and Google translated farmer part as follows.
==== Translation by Google ====
Validated by joint research with Kitasato Institute
World's first * 1 , Plasmacluster Ion (R) * 2 technology inactivates floating "Coronavirus"
In recent years, new viral infections such as SARS (Coronaviridae) and avian influenza (Orthomyxoviridae) have occurred, and the number of cases that threaten people's health has increased. Sharp has pursued air purification using new technologies and has systematically verified the effects of plasma cluster ions on harmful substances that cause airborne diseases. This time, in cooperation with Dr. Tatsuo Suzuki and Dr. Noriotada Kobayashi, the Kitasato Institute and the Kitasato Institute Medical Center Hospital, a world-leading institution in virus research, the feline coronavirus belonging to the coronaviridae family was treated with plasma cluster ions. An activation demonstration experiment was conducted. As a result, we demonstrated that 99.7% was inactivated within 40 minutes, that is, it was able to destroy viruses and suppress infectivity.
As a result, the efficacy of plasma cluster ions in three basic types of major pathogenic viruses caused by airborne infections could be verified.
"Plasma cluster ion technology" is a technology that releases a large amount of positive and negative ions generated from water molecules and oxygen molecules in the air into the air to surround mold, influenza virus, mite allergens, etc. This is a revolutionary air purification technology that is inactivated by a reaction. We developed this technology in 2000, and are working to verify its efficacy in collaboration with academic research institutions around the world based on the idea of academic marketing * 3 .
* We are also working on the demonstration of the effect of plasma cluster ions on inactivating SARS virus.
* 1 As of July 27, 2004, at Plasmacluster Ion
* 2 Plasmacluster, Plasmacluster Ion and Plasmacluster are trademarks of Sharp Corporation.
* 3 A marketing method for verifying scientific data on the efficacy of technology in collaboration with advanced academic research institutions and promoting commercialization based on the data.
Their Product is here. https://jp.sharp/kuusei/plasmacluster/
(in Japanese with photo).
I have the Air Cleaner by Sharp and is using it sometimes (not always). I'm not sure it works against virus or not.