He was arrested this month in New Hampshire in connection with stealing drugs from a hospital, and it's believed he infected 30 people in that state with hepatitis C through infected syringes.

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Researchers at the Medical Research Council Biostatistics Unit, in Cambridge, estimated when people were infected based on the state of their immune system.

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On Tuesday, Javier Usabiaga Arroyo, a state agriculture official, said the total number of infected chickens killed was about 1.2 million, Mexico's state-run Notimex news agency reported.

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Since then it is known to have infected 2, 300 people in the state, of whom 76 have died.

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The H7N9 virus has infected a total of 83 people, killing 17, state media said on Thursday.

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Six people have died after being infected with the H7N9 bird flu virus, according to Chinese state media Friday.

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That's when the Centers for Disease Control and Prevention launched a network of 50 specialized laboratories across the country for state-of-the-art analysis of samples from infected patients.

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