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若い人はウイルスがうつっても体の具合が変わらなかったり、病気が軽かったりするため、知らないうちにウイルスを広げていることがわかりました。

May someone explain to me what the function of も in 若い人はウイルスがうつっても is please?
The way I interpreted this sentence is as: "Even if the virus spreads among
young people, the conditions of their bodies are sometimes stable and
sometimes slightly sick." Therefore, before we know it, we found out that the
virus has spread. Just for clarification, when たり....たりする is used with
adjectives, would that indicate "sometimes this, and sometimes that," or is it
like a verb, indicating, "this and that?"
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2020-04-15T01:42:48.683
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2020-04-15T03:20:10.350
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question
grammar particle-も
NHK Coronavirus Article Sentence Translation Help with たり and も
You have just slightly mistranslated several different parts of the sentence,
but they've added up to make something which is a little bit off the mark.
Let's look at this clause by clause.

> 若い人はウイルスがうつっても体の具合が変わらなかったり、病気が軽かったりする

This `うつる` is referring to
[_catching_](https://eow.alc.co.jp/search?q=%E3%81%8C%E3%81%86%E3%81%A4%E3%82%8B)
the virus, not spreading it, and this whole clause is talking about what
happens to a hypothetical young person if they were to catch it. The `も` here
is perhaps better addressed as `ても`, which here (and typically) means `even
if`. You can see some simple examples of its usage
[here](https://jlptsensei.com/learn-japanese-grammar/%E3%81%A6%E3%82%82-temo-
meaning/). A translation of this whole clause might look something like this:

> Even if young people catch the virus, there is often no change in their
> physical condition or they have only minor symptoms.

Finally, addressing `たり`, there is really no meaningful difference between its
usage in adjectives or verbs. It still functions as a method of incomplete
listing; the aforementioned lack of change in physical condition or minor
symptoms are a subset of some possible range of phenomenon.

> 知らないうちにウイルスを広げていることがわかりました

This is a little bit awkward to produce a direct translation for, but I would
translate it as something like this:

> (We) realized that (they) had been spreading the virus without knowing it

Looking at a broader range of possible translations for `知らないうちに`
[here](https://eow.alc.co.jp/search?q=%E7%9F%A5%E3%82%89%E3%81%AA%E3%81%84%E3%81%86%E3%81%A1%E3%81%AB)
may help. It's important to note that in this case it is presumably the young
people in question who are the subject of this `知らない`, as evidenced by the
fact that they are definitely the subject of the `広げる` that comes after it.

So, putting everything together:

> (We) realized that because young people often exhibit no change in their
> physical condition or have only minor symptoms even if they catch the virus,
> they had been spreading the virus without knowing it.
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2020-04-15T03:20:10.350
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2020-04-15T03:20:10.350
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answer