Greenies, so named by Hunter, play a larger role in Plague. Hunter claims one dropped a strange liquid on him during the attack. Later, parasitic wasps begin eating Hunter from the inside out. It is later discovered that the greenies are spreading the parasites. They attack Sam Temple, Dekka Talent, and Computer Jack as the three search for water. One manages to drop liquid on Dekka. The parasites infect her, and she barely survives.
After Plague the Greenies are not killed, but do not re-appear