Preliminary data suggest 100% vaccine efficacy with Pfizer-BioNTech COVID-19 vaccine in children aged 12 to 15

Preliminary phase III data in 2260 children suggest that the Pfizer-BioNTech COVID-19 vaccine has 100% efficacy in 12 to 15-year olds (18 COVID-19 cases in placebo group vs 0 cases in vaccinated group) with adverse effects consistent with those in subjects aged 16 to 25 years.

British Medical Journal