Rubbish, the first two jabs worked but effect has been found to wane over time.
The booster kick starts the memory process so our immune system can do its job and prevent the virus from replicating.
"Booster shots are not a sign that vaccines aren’t working—but rather that our immune system needs repeated, well-timed exposures, especially for new diseases, to produce longer-lasting memory so that we are protected when future exposures occur"
