Mary Poppins and the Polio Vaccine.

Sources:

https://www.npr.org/2021/01/08/954413533/his-vaccine-story-inspired-his-father-to-write-a-disney-classic

https://www.cdc.gov/vaccines/vpd/polio/index.html#:~:text=Inactivated%20polio%20vaccine%20(IPV)%20is,four%20doses%20of%20polio%20vaccine.

https://sangamoncountyhistory.org/wp/?p=12744

https://www.sciencemuseum.org.uk/objects-and-stories/medicine/polio-20th-century-epidemic

Music: www.purple-planet.com

https://www.youtube.com/watch?v=ks4u1NFV4eQ