First wild koalas caught and vaccinated against chlamydia

Australian scientists have begun vaccinating wild koalas against chlamydia in a pioneering field trial in New South Wales (Mark Baker/AP)

Australian scientists have begun vaccinating wild koalas against chlamydia in an ambitious field trial in New South Wales.

The aim is to test a method for protecting the marsupials against a widespread disease that causes blindness, infertility and death.