tawganator,
Yautja,
14 years ago
Other then getting it surgically removed, there have been two accounts of survival that I'm aware of. In Aliens: Advent it mentions that the character Zorn is the only known survivor of a chest-burster, though imediate surgery was required. Also in Aliens: Labyrinth the character Doctor Crespi survived after being impregnated by a face-hugger when the chest-burster failed to grow and died due to disease.
So there you have it you are not 100% doomed if you are face hugged. Though you are more likely to die of old age in a war zone then survive, it is still a slim possabilty.