from the link above

> While vaccines have an overwhelmingly positive safety profile, it's essential to address concerns about potential adverse events comprehensively and compassionately. Vaccine safety is of paramount importance, both in personalizing vaccine choice and weighing risk vs benefit, but also in establishing trust in the population. While most vaccine-associated adverse events are mild and transient, it is critical to be vigilant about rare, silent, or subtle reactions.

which is all true

basically this is just a call to action to make sure vaers works and the data is as good as possible