In the majority of cases, COVID-19 takes the form of a mild cold or is even symptom-free. Therefore, it is highly unlikely that all cases of infection are recorded, in contrast with deaths which are almost completely recorded. This leads to an overestimation of the CFR. According to a study of 565 Japanese people evacuated from Wuhan, all of whom were tested (regardless of symptoms), only 9.2% of infected people were detected with currently used symptom-oriented COVID-19 monitoring [5]. This would mean that the number of infected people is likely to be about 10 times greater than the number of registered cases. The CFR would then only be about one tenth of that currently measured. Others assume an even higher number of unreported cases, which would further reduce the CFR.