The cdc has revised their estimates down in wuhan from 17% to 12%, and hospitalization rates have also gone down as testing has improved over the last few weeks. On the flip side there is mounting evidence that many COVID-19 deaths are not being counted.

[1] https://www.cdc.gov/mmwr/volumes/69/wr/mm6915e3.htm

[2] https://wwwnc.cdc.gov/eid/article/26/6/20-0233_article

[3] https://www.nytimes.com/interactive/2020/04/28/us/coronaviru...