We found a lower case fatality rate
(1.4%) than the rate that was recently reportedly, probably because of the difference in sample sizes and case inclusion criteria. Our findings were more similar to the national official statistics, which showed a rate of death of 3.2% among 51,857 cases of Covid-19 as of February 16, 2020.
Since patients who were mildly ill and who did not seek medical attention were not included in our study, the case fatality rate in a real-world scenario might be even lower.
https://www.nejm.org/doi/full/10.1056/NEJMoa2002032
If one assumes that the number of asymptomatic or minimally symptomatic cases is several times as high as the number of reported cases, the case fatality rate
may be considerably less than 1%. This suggests that the overall clinical consequences of
Covid-19 may ultimately be more akin to those of a severe seasonal influenza (which has a case fatality rate of approximately 0.1%)
https://www.nejm.org/doi/full/10.105...02387?query=RP