There's evidence that a booster dose reduces a person's likelihood of being infected with SARS-CoV-2.
That's super like Mario, but less likely doesn't mean impossible.
In general, boosters reduce symptom severity and duration, and reduce transmission: hub.jhu.edu/2022/01/11/covid…
Let's Get Boosted
From preventing COVID-19 altogether to lessening symptoms and transmission with breakthrough infections, there are several important reasons to get an mRNA booster ASAP