While it is true that COVID vaccination cannot fully prevent COVID illness or fully prevent someone from being contagious with COVID, it decreases the chances of both of these. Most importantly, vaccination significantly helps decrease the chances of severe or long term illness from the COVID virus. For more information on serious or long term concerns from COVID viruses in youth, please see this article just released by the American Academy of Pediatrics:

https://www.healthychildren.org/English/health-issues/conditions/COVID-19/Pages/Post-COVID-Conditions-in-Children-and-Teens.aspx