Any way you dice it up Italy is seeing something way beyond the damage implied by the 1% mortality rate you quoted.
Re:
assumptions, misinformation etc ..
From University of Minnesota
Studies profile lung changes in asymptomatic COVID-19, viral loads in patient samples
In new research developments, a team from Wuhan, China, reports that even asymptomatic patients with COVID-19 pneumonia have abnormal lung findings on computed tomography (CT), and a group from Beijing noted that viral loads from infected patients appear to peak 5 to 6 days after symptom onset.
Studies profile lung changes in asymptomatic COVID-19, viral loads in patient samples
From The Lencet
COVID-19 pneumonia manifests with chest CT imaging abnormalities, even in asymptomatic patients, with rapid evolution from focal unilateral to diffuse bilateral ground-glass opacities that progressed to or co-existed with consolidations within 1–3 weeks. Combining assessment of imaging features with clinical and laboratory findings could facilitate early diagnosis of COVID-19 pneumonia.
https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30086-4/fulltext
Other open topics ..
1. reinfection / immunity storm topics.
2. long term damage - esp. for asymptomatic carriers
3. airborne or not
4. other organ damage + transmission vectors (blood?)
5. endemic - becomes a permanent facet of life
6. mutation risk - variants L + S + ?.
7. incubation period - various reports