>Another possibility is that Italy doesn't have a handle on who is or isn't infected so what they report are the obvious infections, who tend to be older.
This is very likely the case, as can be seen in the positive test outcome rates.
16.7% in Italy vs. 3.6% in South Korea
Italy has run around 60k tests.
South Korea are testing around 15k people/day and have tested 234k people in total. They've even setup drive-through testing centers where anyone can drive through, get tested, and get results via SMS in under a day.
The result of this is likely a much larger number of asymptomatic or mild cases in the South Korean numbers, which based on the China data, tend to be a lot younger.
https://www.cdc.go.kr/board/board.es?mid=&bid=0030
https://github.com/pcm-dpc/COVID-19/blob/master/schede-riepi...