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Lawrence J. Peterson, M.S.P.H.; Woodrow W. Benson, M.P.H.; Frederick O. Graeber, M.D.
JAMA. 1955;159(4):241-244. doi:10.1001/jama.1955.02960210007003.
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This report is intended to present evidence confirming the presence of live virus in the poliomyelitis vaccine made available by the National Foundation for Infantile Paralysis for the inoculation of first and second grade school children in Idaho in the spring of 1955 and to present in a factual manner the impact that the use of such a vaccine has had on the state. The Francis report was accepted in Idaho as sufficient evidence that the Salk poliomyelitis vaccine was safe and potent. The vaccination program began in Idaho on April 19 and was discontinued on April 27. During that period approximately 32,000 first and second grade children received one injection of vaccine produced by Cutter Laboratories. Two lots of vaccine were used, E6058 and E6039.

Two cases of poliomyelitis were reported in Idaho on April 26, one resulting in a fatality. It was thought, of course, that some of


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