Everything has a timeline

TiMELiNES

1935

Early polio vaccine attempts fail

Premature vaccine efforts showed the difficulty of safe immunization.

Canonical milestoneUnited States1 timeline

Context

Appears In

TimelineTimeline of Polio Eradication

Position 3

Authority

Sources

World Health OrganizationConfidence 98%

Taxonomy

Tags

public-healthdiseasevaccination