Today my 4yo had the privilege of participating in the Pfizer-BioNtech COVID19 vaccine clinical trial @TexasChildrens for 2-4yo. We are thankful to the scientist, pharmacists, & others involved in the vaccine development process for working to keep our children safe ❤️ @Pnyx2010 pic.twitter.com/DLJ3gGPtWU

— Jill Weatherhead, MD, PhD (@JillWeather) October 25, 2021