This study estimated the case fatality rate (CFR, deaths among those presenting symptoms) and infection fatality rate (IFR, deaths among all who tested positive

This study estimated the case fatality rate (CFR, deaths among those presenting symptoms) and infection fatality rate (IFR, deaths among all who tested positive) of infected passengers on the Diamond Princess: https://cmmid.github.io/topics/covid19/severity/diamond_cruise_cfr_estimates.html https://cmmid.github.io/topics/covid19/severity/diamond_crui... CFR was estimated at 2.3% and IFR at 1.2%, reflecting that roughly half of infections were asymptomatic. The downside is that the median age of passengers was 58, so it's not truly representative of CFR for all ages. (That's why people are still using data from China; the cruise ship isn't demographically representative.) You also need to consider that 15% of cases are serious, and may require mechanical ventilation. If medical systems are overwhelmed, it will go up. We saw that in Wuhan.