Common illness has been rationalised, restructured and made fit for purpose in the 21st century.

The title refers to the most common illness among tourists.

It's a diagnosis of a ridiculously obscure disease when it's much more likely that the patient has a common illness presenting with uncommon symptoms.

These common illness were examined not because of their seriousness but because of their frequency.

Trench fever was one of the most common illnesses on the front line, spread by lice that lived in soldiers' uniforms.