Everything has a timeline

TiMELiNES

1955

Salk polio vaccine declared safe and effective

Mass vaccination entered a new modern era.

Canonical milestoneUnited States1 timeline

Context

Appears In

TimelineTimeline of the History of Vaccines

Position 11

Authority

Sources

World Health OrganizationConfidence 98%

Taxonomy

Tags

public-healthmedicinevaccines