We've seen that happening in other cases as well, so it's not surprising.

It's still early days in terms of human cases being found in China. There isn't that much experience perhaps in dealing with possible human cases, and further support might be needed more now than perhaps later.

I don't think the ministry is trying to conceal the cases, ... The cases occurred in a remote and isolated area, and the symptoms might be similar to many other diseases, so it's not easy to determine the reasons.

The latest deaths indicate that H5N1 is a particularly virulent pathogen, as we have seen in cases in other countries.