Timing of Vaccination

Annual vaccination is recommended before the onset of each influenza season. The period of peak influenza circulation is typically June to September for most parts of Australia. While protection is generally expected to last for the whole season, optimal protection against influenza occurs within the first 3 to 4 months following vaccination. It is never too late to vaccinate since influenza can circulate all year round. Vaccination should continue to be offered as long as influenza viruses are circulating and a valid vaccine (before expiration date) is available. Revaccination later in the same season for individuals who have already received vaccination is not recommended, although not contraindicated. 

Source: https://www.health.nsw.gov.au/immunisation/Pages/flu.aspx#influenza

Remember we bulk bill our patients!