step 1: block all openings and windows with wood.
step 2: Find a mask to cover your mouth with before going out scavenging.
step 3: Use a melee weapon including swords,axes, baseball bats, don’t use any thing that requires ammo because it takes time to reload and zombies are attracted to loud noises especially gun shots.
step 4: make sure the area you are going into is completely clear before settling.
step 5: double tap.Make sure the zombie is completely inactive.

This is the closest that anyone’s ever been in contact with. If you ever come in contact with one. It is the best to fight them off with a katana.