Teplan Blight

Viral disease, characterized by spider-like lesions that appear blue at birth but redden as death approaches. Introduced by the Jem'Hadar to the Teplan race as retribution for not joining the Dominion. Electromagnetic fields produced by modern technology cause a "quickening" of the virus. Though no cure could be produced, a vaccine was created that protected unborn children and those who hadn't contracted the disease.