Key points from article :
Aussie flu or H3N2 is an influenza A virus that appears to cause more severe infections in young children and the elderly.
Flu symptoms come on very quickly and can include: fever (temperature above 38C), aches, exhaustion, dry cough, sore throat, tummy pain or diarrhoea etc.
Most people will recover in about a week and won't need any specific treatment, apart from a bit of bed rest, some paracetamol or ibuprofen and drinking plenty of fluids.
But it could be deadly for the very old, very young or people with pre-existing health conditions such as heart disease.
The study was published in the Proceedings of the National Academy of Sciences (PNAS).
