King of Thorn Series by Yuji Iwahara, 岩原裕二

Kasumi and her sister, Shizuku, are infected with the Medusa virus, which slowly eats away at the body. There is no cure, but of the two only Kasumi is selected to be cryogenically frozen with 159 others until a cure is found. At some point in the future, Kasumi awakens to find herself in an unfamiliar world with violent monsters. Older teens.

"It's edge-of-the-seat action all the way." --Anime News NetworkNarrowly escaping their island prison through the once-welded underground hatch, our band of survivors now find themselves making a tense escape through a half-submerged tunnel... more"It's edge-of-the-seat action all the way." --Anime News NetworkNarrowly escaping their island prison through the once-welded underground hatch, our band of survivors now find themselves making a tense escape through a half-submerged tunnel. The watery path may look serene at first, but what monstrosities await them beneath the inky depths? And who is the mysterious girl watching their every move? When a shocking revelation shatters the group to the core, not all of them will continue on to freedom...or answers."It's a gripping entry in the genre of violent survivor manga." --Publishers Weekly less

Having faced multiple threats, the Medusa Virus survivors begin to probe further into what's happened. They have Peter's hard drive, but what will they find on it? And will they even have time to look? A new threat emerges that will find Marco face to face with the slimiest monster on this chillingly altered earth. The former mercenary has proved to be quite adept at staying alive, but will this confrontation be the one that puts him in the ground?

Kasumi awakens from a cryogenically frozen state to find herself in a strangeand treacherous world. Older teens.

Kasumi awakens from a cryogenically frozen state to find herself in a dangerous, treacherous world.

Kasumi is one of a handful of survivors afflicted with the deadly Medusa virus. However, a drastic attempt to find a cure leads to her awakening in a frightening new world full of monsters and thorns. Now, she must fight for her very survival if she's to figure out what went wrong and if there's any way it can be fixed.