Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Informative introduction to polio history

Knowing very little about vaccines and the history of Polio, I learned quite a bit from the book. Like other readers stated, there was quite a bit of extra information that I skimmed over and the author seems to idealize Salk quite a bit, but besides that I enjoyed the book. He does make a good point about the Salk vs Sabin issue. Salk's solution was a quick and dirty implementation which was very effective. Ultimately a combination of the live and killed virus served to almost erradicate the disease, but salk saved a lot of lives and a lot of anguish by getting a solution out very quickly instead of wading through the proper social channels, which are designed to feed the hosses at the top, and not solve problems quickly.