Could be. If you watched World War Z, they figured out that giving all the living, uninfected, humans a vaccine that mimicked a disease, they could make themselves invisible/camouflaged from the zombies, keeping them from attacking and gave the fighters an upper hand in killing the remaining zombies off. If you remember at the prison, they always had dead (really dead) zombie corpses laying around but it didn't seem to keep new ones from trying to get through. It will be interesting to see how Terminus is portrayed in the coming season and whether or not they are THE cannibals from the comics.
A final thought is I am wondering what angle they will work with Judith or other babies born after the zombie apocalypse. Seeing as everyone has the latent virus now and dying turns you into one rather than just being bitten, perhaps babies will have some kind of immunity to attacks - they will appear as already infected to zombie senses and bypassed? If the series goes another several years, maybe they will develop some kind of global recovery, who knows???
Or maybe Judith has the cure running through her veins!