Two nurses at the penitentiary in Fort Madison, Iowa incorrectly administered the vaccine, according to a statement by the prison on Thursday. The incident occurred on Tuesday, leading to a pause in vaccinations at the prison after the two staffers were placed on temporary leave.
Iowa Department of Corrections spokesman Cord Overton told the Des Moines Register that most of the affected inmates had only minor symptoms like those associated with normal doses of the vaccine, such as sore arms and body aches. At least one prisoner suffered a fever, which was treatable with Tylenol.
Prison officials sought guidance from experts at the CDC, Pfizer and the University of Iowa, who recommended that the inmates be monitored for at least 48 hours. Kimberly Koehlhoeffer, the mother of an inmate, told the Register that her son and other prisoners had other reactions, such as nausea and severe dehydration.