The common cold (what coronoviruses are involved with) is a natural, often yearly, process of the body, potentially to detoxify, who knows. But "the virus" likely comes from within us, and virus transmission theory is a bunch of bullshit.  If viral theory was right, there would be tons of diseases flying around that humans get mass infected with at arbitrary times, pandemics everywhere all the time. But we dont see that... why does the cold have a season? Why isnt there a "the hot" disease we catch in the summer?