calendar, Australian influenza season is typically from May to September.
The CDC echoes that sentiment, noting that September and October are the best times to get vaccinated, because it's ideal to get the flu shot before influenza really begins circulating in the area.Experts say relying on last year's vaccine is not a good idea, as protection from the vaccine decreases over time and the influenza virus changes every year, which is why an annual vaccine is necessary.
The best time to get the flu shot in 2022 is in September or October, ideally before October 31, the CDC says.