Book your flu appointment with Capital Chemist
The most common vaccine "method" is a walk-in. All stores are happy with this process.
The second most common would be a phone call - Capital Chemists are equally happy with that method.
Most stores have vaccine services available at all times but to be doubly certain a quick phone call or email will confirm.
In terms of online booking, each store has its own preferred method.
Contact details for their local store can be found on their webpage
https://capitalchemist.com.au/stores.aspx