Pfizer to seek Health Canada approval for COVID-19 vaccine use in kids 12-15 within weeks The announcements comes after the drugmakers said their vaccine was found to be safe, effective and produced robust antibody responses in 12 to 15-year-olds in a clinical trial late last month.The companies said more than 2,200 adolescents between 12 and 15 participated in the trial.A total of 18 cases of the coronavirus were identified in the group that was given a placebo shot, but no infections were declared in the group that was given the COVID-19 vaccine.More to come….