It is the level of testing isn't it? Death pr. infected goes from 0.4% (Germany) to 1% (Diamond Princess) to 7.8% (Iran) to 9% (Italy). If you have plenty of

It is the level of testing isn't it? Death pr. infected goes from 0.4% (Germany) to 1% (Diamond Princess) to 7.8% (Iran) to 9% (Italy). If you have plenty of resources and you do contact tracing you are going to find many cases and the denominator will be high. If you are pressed on ressources and only test people admitted to hospitals with obvious symptions then the denominator will be low. Demographics, overall population health, polution explains some of it but not a difference of factor 20.