The Pfizer-BioNTech Vaccine Is Said to Be Powerfully Protective in Adolescents. your-feed-science, Clinical Trials, Children and Childhood, Disease Rates, Vaccination and Immunization, Coronavirus (2019-nCoV), Age, Chronological, Antibodies, AstraZeneca PLC, Food and Drug Administration, Johnson & Johnson, Moderna Inc, Pfizer Inc, United States