That 38 year old man was the one I talked about above, the person who went to the hospital on whom they first found the disease, but not necessarily the person

That 38 year old man was the one I talked about above, the person who went to the hospital on whom they first found the disease, but not necessarily the person it originated from. Likely they have asked him (as well as anyone else affected) whether he's been outside of the country and he answered no (otherwise they'd say they have found the origin). I'm not an expert, so I looked up what "Patient Zero" is defined as. Wikipedia [1] defines it as the case that has been detected first, but also says that media has used the term to refer to the source of the disease. So the Italian media's use actually matches the Wikipedia definition, while my use in the post above, as in this CNN post [2] matches the other definition. Sadly the term is a bit vauge. [1]: https://en.wikipedia.org/wiki/Index_case https://en.wikipedia.org/wiki/Index_case [2]: https://edition.cnn.com/2020/02/23/europe/italy-novel-coronavirus-spike-intl/index.html https://edition.cnn.com/2020/02/23/europe/italy-novel-corona...