Food safety experts traced the salmonella outbreak to Wright County Egg, near Galt, Iowa, which is one of two companies whose eggs are believed to have been contaminated. More than 500 million eggs have been recalled. Nirmalendu Majumdar/AP hide caption

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Food safety experts traced the salmonella outbreak to Wright County Egg, near Galt, Iowa, which is one of two companies whose eggs are believed to have been contaminated. More than 500 million eggs have been recalled. Nirmalendu Majumdar/AP hide caption

toggle caption Nirmalendu Majumdar/AP

This painting by John Bridges depicts Christ healing the mother of Simon Peter. A scientific paper speculating on the nature of her illness sparked a controversy and was withdrawn. Wikimedia Commons hide caption

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MRSA bacteria like these are on the run in hospitals. CDC hide caption

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Drug-Resistant Staph Infections Decline In Hospitals

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