Earlier quoted context omitted.
Biochemist here: your claim that vaccination puts children in a worse position is neither supported by this paper, nor substantiated by any other data point to the best of my knowledge.
Boys at least appear to be more in danger from the vaccine than the virus. https://www.theguardian.com/world/2021/sep/10/boys-more-at-r...
The paper in question found that in this age group risk of hospitalization for cardiac adverse events (CAE) is a few times higher than risk of hospitalization with Covid.
It’s unclear (to me at least) how to quantify the level of danger in terms of acute and long term health effects from just this data.
> Further research into the severity and long-term sequelae of post-vaccination CAE is warranted. Quantification of the benefits of the second vaccination dose and vaccination in addition to natural immunity in this demographic may be indicated to minimize harm.
https://www.medrxiv.org/content/10.1101/2021.08.30.21262866v...