https://www.fiphysician.com/after-social-distancing/
Interesting article and a bit more optimistic about the future.
"Above, you can see from an interesting paper that there are two different strains of Covid-19 that have been isolated. One strain, the L type in blue, is more virulent. During the epidemic in China, the virulent L type was more commonly isolated in Wuhan that outside of Wuhan, and was more commonly isolated early in the outbreak more so than late in the outbreak.
What is fascinating, is that the S type is considered phylogenetically to be the ‘older’ strain. Thus consider this picture: somewhere in China the S type is circulating. Maybe it is exported to other parts of the world, but it is less virulent and causes less symptoms. Because it causes less symptoms, it is less contagious and less likely to cause an outbreak of deaths that is noticed by doctors or public health officials.
Then, a mutation and the L type is created from the S type. This happens in Wuhan, leading to the localized epidemic of this more virulent strain. Initially, testing is focused in Wuhan where the L type outbreak is happening, so that is what is seen. Later on, in Wuhan and other parts of China, you start testing less ill individuals and you start finding the more mild S type.
This is an interesting story. It shows we are more likely to detect the virulent strain and less likely to detect the less virulent strain. This less virulent strain increases in circulation and predominates in a world where we can no longer seek and destroy."