Massive field trials conducted by U-M led to the April 12, 1955, announcement that a polio vaccine was safe and effective.
Massive field trials conducted by U-M led to the April 12, 1955, announcement that a polio vaccine was safe and effective. Read about some of the other things that happened in U-M history during the week of April 6-12. Click the photo and expand your browser window to view a larger version.
Tags: