I think commenter is referring to Multisystem Inflammatory Syndrome in Children (MIS-C) that specifically impacts children.

https://www.cdc.gov/coronavirus/2019-ncov/daily-life-coping/...

282 for all of 0-17 ages

In context, Israel had 9 (for 1/40 of US population - similar rate) and a reporter that actually inquired about each case, reported that every single one of them died while PCR positive but corona was not implicated in death (e.g. one had terminal cancer at a “dying any day” stage and in fact recovered from corona before dying; another was a traffic accident casualty, etc)

Also 40 cases of MIS-C; corona isn’t benign, but by all counts it’s less harmful than the flu at ages 0-19, though much more harmful for older people.

And a couple of cases of heart attacks and life threatening thrombosis at 16 associated and almost surely resulting from the vaccine. It’s safe, but not perfectly safe as many believe.

In such small numbers, it is incredibly hard to compare short term safety of disease and of vaccine. (And of course impossible to assess long term effects of either as well)