【单选题】

{{B}} Questions 26 to 28 are based on the passage you have just hearD、{{/B}}

A、About 26 cases have been confirmed to contract H5IN1 in the TropicalDisease Institute.
B．Vietnam has detected 65 human cases of bird flu infections sinceDecember 2004.
C．Bird flue has been spotted in 10 localities in Vietnam since October 1.
D．The outbreak sinceDecember 2003 has cost losses 46.6 million US dollars in Vietnam.