Goofs

When Sid Haig's character enters Henry's house, Henry appears to be fine, despite just being bitten by his daughter. In the very next shot he has bandages over his neck which were not in the shot before.

When Ben rescues Barbara on the motorcycle, she is wearing shoes. When they get to the house, she is barefoot. In the next scene as she enters the hallway she is wearing flip flops. In the scene where she enters the living room she is barefoot again.

When Gerald Tovar Jr. was feeding his blood to his dad, Gerald didn't turn into a zombie.

When Barbara tries to call Johnny on his cell phone and she gets his voicemail, she keeps begging for him to pick up the phone. Voicemail is not like an answering machine. You don't hear the person's voice while they are recording the message, so it would make no sense for her to keep asking him to pick up.