The COVID-19 story keeps developing. At first, everyone listened to epidemiologists telling us that a great deal of social distancing, and even the closing down of economies, would be helpful. After trying these things, we ended up with a huge number of people out of work and protests everywhere. We discovered the models that were provided were not very predictive. We are also finding that a V-shaped recovery is not possible.
Now, we need to figure out what actions to take next. How vigorously should we be fighting COVID-19? The story is more complex than most people understand. These are some of the issues I see:
 The share of COVID-19 cases that can be expected to end in death seems to be much lower than most people expect.
Most people assume that the ratios of deaths to cases by age group, computed using reported cases, such as those included in the Johns Hopkins Database, give a good indication of the chance of death a person faces if a person catches COVID-19. In fact, the cases reported to this database are far from representative of all cases; they tend to be the more severe cases. Cases with no symptoms, or only very slight symptoms, tend to be missed. The result is that ratios calculated directly from this database make people think their risk of death is far higher than it really is.
The US Center for Disease Control has published Planning Scenarios, based on information available on April 29, 2020.* Using this information, the CDC’s best estimate of the number of future deaths per 1000 cases with symptoms is as follows:
Ages 0 – 49 0.5 deaths per 1000 cases with symptoms
Ages 50-64 2.0 deaths per 1000 cases with symptoms
Ages 65+ 13.0 deaths per 1000 cases with symptoms
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