More than 99% of those who died in the COVID-19 outbreak in Italy had familiar co-morbidities...

...but there's little solace in that for the living (there is no solace for the dead), as they are extremely common:

Almost half of the victims suffered from at least three prior illnesses and about a fourth had either one or two previous conditions.   More than 75% had high blood pressure, about 35% had diabetes and a third suffered from heart disease....

The average age of those who’ve died from the virus in Italy is 79.5. As of March 17, 17 people under 50 had died from the disease. All of Italy’s victims under 40 have been males with serious existing medical conditions.