The 2-year-old son of a soldier deployed to Iraq is in critical condition after developing a reaction to his father’s smallpox vaccination, the U.S. Centers for Disease Control and Prevention said on Saturday. The child, being treated in a Chicago hospital, has a rare but very serious reaction to the vaccination site called Eczema vaccinatum, the CDC said. It is the first such case since vaccination against smallpox resumed in 2002, said CDC pox virus expert Dr. Inger Damon. Full Story