Adolescents 12 through 17 are eligible for COVID-19 vaccination. In a clinical trial of the Pfizer-BioNTech COVID-19 Vaccine the most commonly reported side effects following vaccination in people 12 through 15 were mild to moderate and consistent with those reported in participants 16 and older.
Read more at: http://www.fda.gov/consumers/consumer-updates/5-things-you-need-know-about-covid-19-vaccine-adolescents-12-through-17