Don't ignore persistent coughs, they can be 'lung cancer warning'

An expert has claimed that unexplained coughs and chest infections should be taken seriously as they could be a sign of lung cancer.

According to cancer Australia CEO Professor Helen Zorbas, anyone with a cough that has lasted for three weeks or more should see a doctor, News.com.au reported.

Other signs include a changed cough, coughing up blood or a chest infection that won't go away.