I found this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2863430/) which says these corona virus strains live for months at 4 degrees C, 20% relative humidity. But at 40 degrees C and 80% relative humidity, 90% of it dies in 2 hours.
For example, if people set the furnace to 40 degrees and humidifier to 80% relative humidity for a couple hours each day, does this stop the spread of the virus?