"Julie Lyn Hall" is a prominent public health figure in the United Kingdom, currently serving as the World Health Organization Representative in the Philippines. She was conferred the distinction as Member of Order of the British Empire by Queen Elizabeth II in 2007, in recognition of her outstanding contributions to global public health.

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We have repeatedly said there is a brief window of opportunity to act within China.

The key questions are what exactly is this virus, what risk could it provide to humans and where it goes next. Until the sequencing information is provided by the government, it's very difficult to know.

WHO sees the current situation in China as one requiring heightened vigilance, but still not one of a significant threat to public health.

We would not consider that any of these cases have been thoroughly tested yet, based on the extremely limited information we have seen. We feel at this moment it is really too early to say if both of these cases are negative.

In any way at all.

There is no obvious contact with wild animals, no any obvious contacts with laboratories, nor any travel history.

This latest news strongly suggests that the window is getting smaller with each passing day.

For the risk group to drop, we have to say that no new cases or no new exports have occurred three weeks after the reported cases.

It does show how one person, one case, can potentially spread the disease to a considerable number of people.