Which vaccine is best? The one you can get first, experts say Some health workers worry that patients’ preferences for COVID vaccine brands could slow the rollout of jabs in the US. Pfizer, BioNTech request emergency authorization to vaccinate 12- to 15-year-oldsPfizer and its German partner BioNTech requested to amend their emergency use authorization with the Food and Drug Administration (FDA) Pfizer seeks to expand COVID-19 vaccine use to younger teens - The Boston GlobeA study released last month found that the vaccine was 100 percent effective in preventing COVID-19 in a final-stage trial in children from 12 to 15. Pfizer says vaccine 100% effective for 12-15 olds, asks for US authorizationVaccine maker says it plans to follow up with requests to regulations in other countries in coming days; says shot 'well tolerated' by young people Pfizer asks FDA for approval to give Covid vaccine to children ages 12 to 15Pfizer has requested the Food and Drug Administration (FDA) to clear its Covid-19 vaccine to be used in children ages 12 to 15. Pfizer and BioNTech requested the F.D.A.’s approval to use their vaccine in 12- to 15-year-olds.If approved, it could allow young adolescents to start getting vaccinated before school starts in the fall. Pfizer says its COVID-19 vaccine protects younger teenagersPreliminary data from a study in the US showed there were no cases of COVID-19 among fully vaccinated adolescents compared to 18 among those given dummy shots, Pfizer reported. Pfizer says its COVID-19 vaccine protects younger teensPfizer’s vaccine is authorized for ages 16 and older. But vaccinating children of all ages will be critical to stopping the pandemic — and helping schools, at least the upper grades, start to look a little more normal after months of disruption.