Vaccine ingredients.
This is just one that you'll find.
MRC-5 human diploid cells.
This is all open-source public information.
CDC. gov
https://www.cdc.gov/vaccines/pubs/pinkbook/downloads/appendices/B/excipient-table-2.pdf?fbclid=IwAR3_8pF9aif3ARlHu6BIauy14IjNN22WPaTal1aY28ehGdof24uAb_yKVOg