“booster shots are needed to combat the Delta variant of the coronavirus, and they say that a vaccine for five- to 11-year-old children is on its way.”

https://www.spiegel.de/international/world/biontech-founders-on-vaccine-for-children-things-are-looking-good-and-going-according-to-plan-a-9186ef64-b98f-48fc-b5a2-652406a0eca6