ABC Radio Australia
Researchers say a rare case of people being infected with both swine and seasonal flu in Cambodia could lead to a potent combination strain emerging in the future.
A study looking at historical data found a boy and his teacher were infected with both H1N1 and a seasonal flu in 2009 - the year the pandemic swine flu emerged.
In these cases, tests showed there was no "genetic recombination," or mingling of the two flu strains.
The study, published in the American Journal of Tropical Medicine and Hygiene, says that while the cases don't pose a current threat they are a reminder of the dangers that a strain such as avian flu could mix with human flu and affect millions.
Presenter: Sen Lam
Speaker: Dr Ian Barr, deputy director of WHO Collaborating Centre for Reference and Research on Influenza in Melbourne
BARR: Swine flu has symptoms of any of the standard influenza viruses. It's not particularly different, so normally people will suffer from sudden onset, so something will come on them with a short period of time, 8 to 12 hours, usually involving respiratory symptoms, such as a cough, in many cases a fever greater than 38 degrees centigrade and they'll generally feel unwell and may have muscle soreness, and some of the classic symptoms of influenza-like illness.
LAM: And so what do we know about the rare cases of co-infection?





