Is か modifying all three clauses in this sentences?

Question

The following is an excerpt from NHK Easy news article: https://www3.nhk.or.jp/news/easy/k10012922471000/k10012922471000.html

フランスでは、このウイルスがうつる力の強さや、病気が重くなる可能性、どのくらいウイルスが広がっているかを調べています。

I just wanted to know if this か applies to the nested clauses also. I ask this because DeepL translates the sentence as:

In France, we are trying to find out how strong this virus is to spread, how serious the illness may be, and how far the virus has spread.

Basically, it has applied the question quality of か (in addition to the clause it is directly attached to) to the preceding 2 sentences - is this because や has loosely connected all 3 sentences (listing a non-exhaustive list)?

Answer 1

No, it doesn't. か is the question tag in Japanese and of those three clauses, only the last one is a question.

If you want to be strict with the translation, it would be

In France, we are researching the strength of the virus, the possibility of the disease being serious, and how much the virus has spread, etc.

But in English, it sounds more natural if the clauses have the same structure. So DeepL translated it that way.