The Comet's Curse by Dom Testa
Click to view on Amazon Genre: Science Fiction - YA (Going towards the 2012 Genre Fiction Challenge !) The question, "What would you do if everyone was no longer safe on the planet earth?" is answered by a scientist who concludes that the only hope for humanity is to send a bunch of teenagers into space. That is essentially the premise of The Comet's Curse (Galahad Series Bk. 1). The earth is casually orbiting the sun, when a comet, like a proverbial black cat crosses its path, showering the earth and a cloud of comet dust. Many find the phenomenon to be beautiful, but it turns out to be deadly, as the dust somehow contaminates the atmosphere and introduces a wholly foreign virus to the human race. The virus only seems to infect those who are 18 or older, and civilizations crumbles as people realize their days are numbered. When a scientist proposes the plan to send young colonists into space with a mission to colonize a potentially habitable plane...