Errores

When Ann leaves the bedside of John and you hear her praying to keep him around, her reflection passes by a glass of some type and an older gentleman comes into focus in this same reflected area just after her reflection goes by.

The "glass" is a picture frame and the "older gentleman" appears to be her father posing in front of the church, given the immediate scene cut to Ann playing the organ in the church.

Ann uses a Celsius thermometer, despite all of the references to the film taking place in the United States. Fahrenheit thermometers are ubiquitous in the States, Celsius thermometers are much more common in New Zealand where the film was made.

Surviving alone after a nuclear holocaust, and possibly the only person still alive in the entire country, Ann still keeps her armpits and legs shaved.

Ann strips and scrubs her body with soapy water and a brush to remove radioactive contamination, and yet she keeps her panties on, as if her panties were somehow impervious to radiation.