Australia has never seen such record high flu rates during the warmer months, ahead of the full-blown winter flu season, he said. Loading In NSW, a record 8,035 flu cases have been laboratory-confirmed. The true flu rate is likely far higher. The number of NSW cases for the first three months of 2019 is more than double that for the same period in 2017 and 2018. The March flu count alone is three-and-a-half times that of March 2017 and 2018. Northern Sydney Local Health District recorded the highest number of confirmed flu cases in March of 108.

Between January and March, there were 27 confirmed flu outbreaks across NSW, including 17 at aged care facilities, killing seven people and affecting 174 residents. The high rate of confirmed summer flu is partly due to new highly-sensitive rapid flu tests. But the frequency of aged care outbreaks and a rise in the number of people presenting to emergency departments with flu-like illnesses has left little doubt that there has been more flu this summer than in previous years. NSW Health is urging parents of young children, the elderly and other high-risk groups to get their free flu vaccine from May 1. Credit:SHUTTERSTOCK Most Australians get their vaccine in mid-April, before the typical June to September flu season, leaving the population unprotected in summer, particularly for two Influenza A strains. A mild season in 2018 meant the community's natural immunity is likely to be lower than average.

Over 65s are at particular risk from the flu. Their weaker immune systems can struggle to fight the disease off and don’t react strongly to the standard flu vaccine – leaving them unprotected. But summer flu rates were not an accurate predictor of the winter flu season. "I don't think we can draw any conclusion about how severe the winter flu season will be or when it will start from this relatively new summer flu phenomenon," NSW Health’s Communicable Diseases director, Dr Vicky Sheppeard said. The seasonal flu vaccines should offer good protection against the circulating H1N1 influenza A strain, Dr Sheppeard said. But if the H3N2 strain becomes predominant, the vaccines will be less effective and older people will be more vulnerable. She urged parents of small children and other high-risk groups to book a flu vaccination from May 1.

More than 250,000 flu vaccines have been delivered so far, including over 42,000 to aged care facilities across the state. Most GP clinics will have their Commonwealth-funded free flu vaccines by next month, Dr Sheppeard said. Free flu vaccines are available for pregnant women, Aboriginal people, over 65s, and anyone with conditions such as asthma, diabetes, and heart disease. Flu vaccines will also be free for children under five (from six months old) under the NSW government’s $2.6 million program. Based on the size of the vaccine orders, the health ministry is hopeful more children would be vaccinated against flu in 2019 than in previous years.