The WHO pages https://www.who.int/emergencies/diseases/novel-coronavirus-2019) contain up-to-date and global information.

South Korea is doing broad testing, Italy only those with symptoms.

In South Korea, 30 % of all cases are 20-30 years old, in Italy only 4 %.

This means, that A LOT of young people have the corona virus already, but without symptoms. But they spreading it, thinking they are non infectious.