Up to 80 confirmed cases of the swine flu virus have been reported across the Northern Territory since the start of November, in what authorities have named an ‘odd’ flu season.

With over 40 cases in the last week, doctors are urging residents to vaccinate against the virus, as some patients have become seriously ill, leading to hospitalisation.

Authorities have confirmed that the virus has drifted over the years, and is now a different strain to that declared a global pandemic in 2009.