Educational websites with comprehensive history of vaccines.

https://www.historyofvaccines.org/timeline/all

http://www.immune.org.nz/vaccines/vaccine-development/brief-history-vaccination

Children’s Hospital of Philadelphia is a repository of information on children’s health. And indeed, they have a page on vaccines.

https://www.chop.edu/centers-programs/vaccine-education-center

All things vaccines, and not just for kids.

http://vaccines.com/

Latest and greatest recommendation from the government.

https://www.cdc.gov/vaccines/index.html