More romance and less horror focused than the 1st book in this series, Immunity picks up right where contagion left off. The first half of the book is honestly very slow. However the 2nd half picks up and had me glued to the book. It does bother me that everything is tied up in a nice little bow at the end. Considering how rough and gritty the first book was, the sequel really embraced the YA genre. I personally wasn't a fan but others may like it.