Symbiont (Parasitology Trilogy Series #2) by Mira Grant
THE SECOND BOOK IN MIRA GRANT'S TERRIFYING PARASITOLOGY SERIES.
THE ENEMY IS INSIDE US.
The SymboGen designed tapeworms were created to relieve humanity of disease and sickness. But the implants in the majority of the world's population began attacking their hosts, turning them into a ravenous horde.
Now those who do not appear to be afflicted are being gathered for quarantine as panic spreads, but Sal and her companions must discover how the tapeworms are taking over their hosts, what their eventual goal is, and how they can be stopped.
For more from Mira Grant, check out:
Newsflesh Short Fiction
Apocalypse Scenario #683: The Box
San Diego 2014: The Last Stand of the California Browncoats
How Green This Land, How Blue This Sea
The Day the Dead Came to Show and Tell
Please Do Not Taunt the Octopus