Thirst Number 4 by Christoper Pike

I am currently reading Thirst Number 4 by Christopher Pike. This book is about a five-thousand year old vampire named Sita, who is trapped in her friend Teri's body. This happened when Sita was shot and killed at the same time and place Teri was killed.. She then entered Teri's body, but since Teri was not a vampire she couldn't enter Sita's body. Teri died, but Sita came back as Teri Now a group called the Telar are releasing a lethal virus called X6X6. Sita has to become ally's with her enemy the IIC. The IIC has a creation called the Cradle, the Cradle controls minds and makes them do thngs against their free will. The IIC founded the Cradle by studying paraphyscology and using people's ESP to control it. The IIC and Sita have to work fast to kill them, because so far there is no permanent cure.