Worlds Apart is a novel written by Joe Haldeman and published in 1983.
Worlds Apart is a novel in which Marianne O'Hara and others survive in New New York after a virus has killed many millions, anyone over the age of twenty, causing the human race to go nearly extinct. [1] New New York and other space colonies are located above the Earth, which has been devastated by the virus, while O'Hara and the other survivors struggle with the aftermath. A parallel plotline deals with the adventures of her nominal husband on Earth who is immune to the virus because of his acromegaly.
Colin Greenland reviewed Worlds Apart for Imagine magazine, and stated that "It feels perverse to say that a series about the near extinction of the human race seems uneventful, but somehow it does. The futuristic detail is fascinating, but Haldeman relates it in a casual, rambling way that dilutes much of its drama." [1]