China reported four more human H7N9 virus infections on Tuesday, including one death.
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A 70-year-old man in east China's Zhejiang Province was confirmed on Tuesday to have contracted the virus, bringing the total number to 79 in one of the two worst hit provinces.
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East China's Fujian Province also reported three more cases on Tuesday, including one death. Two patients have recovered sufficiently to be discharged from local hospitals.
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So far China has reported more than 120 human H7N9 cases this year, including at least 31 deaths.
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Medical experts are yet to find any evidence of widespread human to human transmission, but warn that poultry raised in people's homes is a source of danger if exposed to birds from poultry markets. Â