We'll start with a book.
Military experiment gone wrong: a virus turns soldiers into vampiric creatures with superhuman strength. Only a six-year-old child can save the uninfected - she can talk to the monsters with her mind.
Here's what I'm thinking for similar items:
Miss Evers' Boys - an HBO movie and stage play about the Tuskegee experiments that took place from the 1930's to the 1970's. The government studied the effects of untreated syphillis on poor African Americans, who thought they were getting free health care. The theme of human experimentation follows from the book.
Outbreak - an older movie about the spread of the Ebola virus.
Jericho - about a small town that is isolated after a nuclear attack.
Twilight Zone - several episodes have apocalyptic and post-apocalyptic themes.
Lost - the idea of a small group of people trying to make sense of their surroundings and create a community of survivors. "The Others" could be compared to the government, complete with human experimentation.
"American Soldier" by Queensryche - progressive rock with songs all about war, being a soldier, coming home from war, the effects of war, etc. The military theme, as well as the metaphorical "monster" theme carries through from the book. (Of course, in the book, the monster theme is quite literal!)
"Piece of Mind" by Iron Maiden - Dark, heavy, military themed (especially the song "The Trooper").
Audiobook, eBook, or print book:
The Road by Cormac McCarthy (also a movie) - Post-apocalyptic, regular humans trying to survive and avoid the bad guys (humans who have become cannibalistic scavengers).
Shannara series by Terry Brooks - Earth was destroyed in a chemical and nuclear holocaust. The books are filled with science, technology, and magic. This one is a bit of a stretch, but there are some shared themes between Shannara and The Passage, like post-apocalyptic society, science, and different beings.
Metro 2033 - for XBox. Rated M. First-person shooter navigates the post-apocalyptic Moscow metro system, shooting mutants.
Fallen Earth - Windows or Mac. Rated M. Based on a real map of the Grand Canyon. A spreading virus, a super-company that becomes a self-sufficient economic and military state, and genetically-altered creatures.
There you have it - my first attempt at multi-type advisory!