In my view this is connected by the differences in the farming practices. In the West farming practices are well controlled -- ducks, chickens and humans do not mingle together.

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.

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