Details for medical caregivers of who gets it:

https://www.statnews.com/2020/03/03...coronavirus-risk-by-demographic-factors/

Interesting speculation:

Begin quote
One intriguing explanation for the apparent resilience of youth: in regions near Hubei province, young children seem especially likely to be exposed to other coronaviruses, scientists in China reported in 2018. That might have given them at least partial immunity to this one.
End quote

Just like the non fatal “cowpox” virus could protect milkmaids in the 1700’s from the 30% fatal smallpox virus,
it might now be that there is a non fatal coronavirus going around as a “common cold” disease that could protect men from the 2.8% fatal COVID-19.

There is a coronavirus that effects chickens and the Israelis already have an oral vaccine pill for chickens that they are quickly trying to adapt for humans.