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"The coronavirus is the cause of about 20% of colds." and "0.2% of cold viruses are coronaviruses" aren't necessarily mutually exclusive statements

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I thought of addressing that, but figured it would be obvious from the tail end of what I quoted:

> There are more than 30 kinds, but only three or four affect people.

There aren't enough cold viruses around to allow for a 0.2% fraction.

30? I thought there were over 100 HRV serotypes, not counting their mutations. And I thought those only accounted for around 35% of all. So 2% is probably a better number. I’m 10x off, just as bad as the parent. Sigh.

That’s a good point.

My mind was definitely in the mode of what number and kinds of viruses that a body is exposed to, not so much how contagious it is, but I see your point.

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