The real number of cases in often remote villages across Brazil's vast hinterland is difficult to ascertain.

The port's vast hinterland loops in eastern Democratic Republic of the Congo, Zambia, Rwanda, Burundi and Uganda.

A brave facade of self-sufficiency covers up a vast hinterland of inferiority complex fully supported by real inferiority.

And then there is the vast hinterland of the internet beyond that, and self-published ebooks and podcasts too.

It is a giant magnet, pulling people from across China's vast hinterland in one of the greatest migrations in human history.