As the first month of winter comes to a close, the number of confirmed flu cases in the ACT have risen above 1000.
The increase in influenza diagnoses comes as health officials urged Canberrans to get themselves vaccinated.
As of June 16, there have been 1119 confirmed cases of influenza in Canberra, compared to just 150 cases at the same point last year, or an increase of almost 750 per cent.
ACT Health did not confirm an exact number as to how many people had died from the flu this year in Canberra, citing privacy reasons, but did say the number was fewer than five.
An ACT Health spokeswoman said that none of the flu-related deaths this year had been children.
Acting ACT chief health officer Kerryn Coleman said ACT Health would continue to monitor flu cases closely over the coming months.
"It is not possible to say if the numbers of flu cases will decline or continue to remain at increased levels," Dr Coleman said.
"We are well and truly into winter and that means a lot of different illnesses in the community, so it's really important that everyone looks after their health."
This year's flu season has been one of the most serious in recent years.
Nationally, there has been more than 97,000 laboratory-confirmed cases of influenza so far this year, up from the more than 58,000 confirmed in all of 2018.
An increased number of flu vaccines have been distributed to immunisation providers this year following the spike in influenza cases.
Demand for the vaccines peaked in April and May, while demand slowed down during June.
The most recent ACT influenza surveillance report showed the majority of flu cases showed up in Canberrans aged between 20 and 64-years-old.
Meanwhile, 11 per cent of cases were children aged younger than four.
A further 13 per cent of cases showed in adults aged over 65.
Vaccinations are provided for free for those older than 65, as part of an ACT government pilot program.
Dr Coleman urged for those most at risk of catching the flu, including elderly people and young children, to be vaccinated.
"The best thing to do is to get vaccinated for illnesses like influenza," Dr Coleman said.
"But for other respiratory viruses and illnesses like stomach bugs, if you or one of your family are sick, please stay home from work and keep your kids home from school and childcare."