Individual risk vs. community risk during a pandemic

It is human nature to think of risk in terms of how it pertains to us as individuals. It is understandable how one might think that their own risk is very low of being infected by SARS COV-2 virus, the virus that causes COVID19 disease, when only 10% of those who become infected in the USA develop symptoms severe enough to be hospitalized.

An individual may also believe that their own risk is very low if they are generally healthy, not obese, not elderly, not a diabetic, or do not have other major health problems.

However, the reality is that we are far from being able to assess our individual...