From The New Scientist:

A respected Japanese scientist, who works with the World Health Organization, says 300 people have died of H5N1 bird flu in China, including seven cases caused by human-to-human transmission.

He says he was given the information in confidence by Chinese colleagues who have been threatened with arrest if they disclosed the extent of the problem.

The allegations, which he revealed at a meeting in Germany, contrast sharply with China’s official position. It reports three confirmed cases of H5N1 in people: a boy in Hunan province who recovered, and two women who died in Anhui province, the latest of which was announced on Thursday. There may be another probable case in Hunan.

UPDATE: Read Dr. Masato Tashiro’s clarification of his statement on Promedmail.org.

He writes:

In my presentation at the meeting in Marburg, I stated that WHO’s official numbers of H5N1 human cases are only based on laboratory confirmed cases. It should be therefore an iceberg phenomenon. Due to poorly organized surveillance and information sharing systems in many affected countries including China, it is reasonable to consider that more cases have occurred actually. We have heard many ‘rumors’or unauthorized information which we cannot confirm. In this context, I talked about a few examples of non-authorized information and rumors about Asian countries which I received through private channels. I clarified that I do not know the original sources and I cannot confirm whether they are true, how these numbers were derived and what laboratory tests and epidemiological investigation were done.