That's a close range weapon with a range of about three inches square. Don't let them get that close. Refuse slow dances. Don't be taken in by the old 'gee your hair smells terrific' routine. You'll be fine.
Zombies are a constant annoying presence.
They smell bad, dress poorly, have rotten posture, and pester you incessantly. They invade your personal space, come rushing up to you at inopportune times, and just will not leave you in peace. They will stop at nothing to get close to you. You now know how celebrities feel about us. Zombies are mostly grazing creatures.