Parents are being urged to vaccinate their young children against the flu after one child died and almost 20 others were hospitalised with serious complications.
The child, who was under the age of five, had not been vaccinated against the powerful influenza A strain N1H1 and died after being admitted to the Children's Hospital at Westmead, Sydney.
Nineteen children - aged one month to seven years - have been treated at the hospital for influenza since April, The Daily Telegraph reported.
Parents are being urged to vaccinate their young children against the flu after one child died
The influenza A strain N1-H1 fuelled the pandemic flu season in 2009 and affects young children and pregnant women the hardest.
Health authorities are urging parents to have their children vaccinated now, despite the season's peak period not expected to hit for another two months.
The official start to the season is expected in two weeks which is the exact amount of time it takes for the vaccination to come into effect.
NSW Chief Health Officer Dr Kerry Chant said only 20 per cent of eligible children have had the free vaccine