After a comet releases a mysterious virus that begins to kill all of the women in the world, a young couple's relationship is severely tested. They hide out (from both the illness and the savages who hunt the remaining women) in their over-sterilized apartment. Ultimately the duo escapes their self-imposed quarantine to head to the wilderness.
Ostensibly, yes. After over a year of living under strict quarantine, the main female protagonist knowingly exposes herself to the toxic ash and becomes sick and dies as a result.
A news report is shown stating that a research facility housing uninfected women has been bombed, killing many if not all of those inside. The bombing itself is not nuclear, nor is it shown graphically