You 100% can. It is continuing to spread, but more slowly, and less effectively thanks to vaccination. It's not binary. Vaccinations are 70-95% effective, which means that somewhere between 5 and 30 people in any group of 100 may still catch the disease. Those that do will be less sick.
We've had vaccines since 1798, this isn't rocket surgery.
We've had vaccines since 1798, this isn't rocket surgery.