Instruct: Classify the given Amazon review as either positive or negative.
Query: informative

The author presents viral research, the researchers, and the health industry in a manner that is informative and interesting for the reader. While the ending somewhat weak it is at least honest-no cure or conclusive proof has been established concerning HHV-6 - the author merely points the reader's interest towards the future.I have read the book twice and I appreciated the lack of hype both times. Sure, the medical cases were heart wrenching from any perspective but the author used the cases to support the story of the researchers cardigan and knox. These couragous individuals were shown among the others seeking to scientifically study diseases. Maybe regush will publish another book-or cardigan and knox.