We need to heard the infected together, move them to a safe location by train.

Or jus advise them to stay home, or get treated at a hospital. These are humans, not cattle.

Too late. They have breathed on other people by the time they are tested.

Maybe the infected can be more easily recognizable by forcing them to wear yellow stars.

And do what exactly ?
Knowing there's no treatment ?

Call it new Australia lol

In boxcars with guns?