This is one area that we ask China to make a further improvement.

There is some room for improvement.

We cannot kill all the chickens and ducks to prevent bird flu from spreading among them and to humans; therefore, we have to make sure the chickens, ducks and humans do not mingle together.

Surveillance is crucial because, in my view, the outbreaks affecting transmission among chickens were there for some time without being noticed.

I think it is similar to tsunamis and earthquakes...we do not know when.

TB-HIV co-infection threatens to reverse the steady progress toward achieving this goal.