Very true. Each country is following also different policies. I personally know a few people that are infected in Spain but have not been officially tested so they don't make part of any statistic.
If they have not been officially tested, how do you know they are infected? It's not enough to have symptoms; I myself had several symptoms about a month ago, but they didn't test me because they were not enough symptoms and I didn't have a travel history to mainland China, so then I still don't know if I was actually infected or it was just a flu.
It is what the doctors told them. Also considering they have been in direct contact with officially tested infected people.
Young people with very hard breathing difficulties (for the first time in their life), fever, muscular and bone pain, etc.
Btw, the doctors call them at least once a day but they are confined at home.
The differentiating question might be did you have a running nose? If yes, it's not the coronavirus.
WHO says "very few" people will get a running nose, but that is not equivalent to saying you do not have the virus if you have a running nose. I'd be careful saying blanket statements like this