Mold spores in certain systems can be killed on contact with certain HEPA air purifies. Not only do the spores die, but they also can't reproduce due to the lack of moisture. Air purifiers can help with cleaner air but can also help with covid-19.
There are many air purifiers available but most on the market do not kill particles under a certain size. Covid 19 particles start at size .06. In order to reduce coronavirus particles in the air, the hepa air purifier would have to be able to handle sizes of .06. Few devices will destroy particles that small. IQ Air is a purifier designed to destroy particles .01 and up which is sure to destroy coronavirus.