Well the interesting thing is that the Euromono data shows a similar trend as the US data, especially if including the 2018 data. The 15-44 year olds while essentially not affected by the 2018 flu did see a spike for covid. I think it would be interesting if the group could be further split up into 15-24 and 25-44 year olds, like the US data.
Regarding the 2018 flu spike, putting things into perspective. I would say yes it does, because it shows how significantly bigger the spike for covid was/is.