We should concentrate on the outbreak in birds. Go upstream and contain it at the source.

We are moving upstream and looking at the source of the spam problem, and it is obviously the zombies.

The important thing is how the authorities handle the outbreak, how swiftly it is addressed and how quickly birds are culled. China in that practice has plenty of experience, so we are confident from the animal point of view the outbreaks are tackled as quickly as they can be.

Currently, all evidence points to domestic ducks as the ones who can shed it and transmit it and not get sick.

It's an easy thing to do and if we don't get it under control in poultry, every year it's going to get back in wild birds and every year it's going to spread around again and we'll never get this thing under control.

We start at a market somewhere in Guangdong Province in China. And it's packed with cages, and you'll have chickens, and you'll have ducks. You might have some other animals -- cats, dogs, turtles, snakes -- and they're all stacked in cages, and they're all spreading their germs to each other.