So HHS/PBS started using Elmo to sell vaccines to children in 2015. There was a small backlash back then, and they have removed some of the videos from YouTube, but the primary one is still there. I wrote a piece on it then, and a follow up today.
"Government Uses Elmo to Sell Vaccines to Minors. AGAIN.
It is unethical to market pharmaceuticals to children."
https://gingertaylor.substack.com/p/government-uses-elmo-to-sell-vaccines?
80 years of science.
https://gingertaylor.substack.com/p/how-do-vaccines-cause-autism#details