The description of this mod says Special Infected have had their health "changed," but this really undersells just how incredibly buffed they are in this campaign. Most of the Special Infected have had their health tripled compared to vanilla L4D2.

I made a stats comparison below so people know what they're getting into, assuming these aren't patched. On Normal mode...

---

TANK

Old HP: 4,000
New HP: 15,000

---

WITCH

Old HP: 1,000
New HP: 3,000

---

CHARGER

Old HP: 600
New HP: 1,800

---

HUNTER

Old HP: 250
New HP: 800

Old speed: 250
New speed: 300

---

SPITTER

Old HP: 100
New HP: 1,100

---

BOOMER

Old HP: 50
New HP: 300

---

SMOKER

Old HP: 250
New HP: 500

Old speed: 210
New speed: 200

---

JOCKEY

Old HP: 325
New HP: 500

*Jockeys aren't supposed to spawn in this campaign, but their health is changed in the code regardless.

---

COMMONS

Old HP: 50
New HP: 18

Old speed: 230
New speed: 200