This section provides information about how vaccines are made, developed, licensed, recommended and required. The section also compares the number of vaccines historically and now and describes the importance of animals and vaccines.

This section provides information about vaccine developments by year, offers a vaccine availability timeline, and highlights some scientists who contributed to the field.

This section provides information about global and U.S. disease cases and deaths and describes how considerations based on country-specific situations can translate into differences in vaccine recommendations across countries.