Monocyte Breeder

Monocyte Breeder is a Fallout: New Vegas perk.

Requirements
This perk is not available during level up, but rather must be purchased. It's an implant named PHOENIX Monocyte Breeder which may be purchased from Doctor Usanagi at the New Vegas Medical Clinic for 12,000 caps. It is designed to gradually heal damage over time.

Effects
Regenerate 1 HP for every 5 seconds.

Note

 * In Hardcore Mode, sleeping on a bed you do not own (or did not rent) does not heal the player, and thus consumables are the only source of healing; with this perk sleeping and waiting will heal based on the equivalent in real-world seconds to the in-game time passed. Fast-traveling will also heal the player for the estimated amount of game-time that the player travels through. Therefore, the healing rate is almost instantaneous, save for the loading sequences between each fast-travel.
 * Since it takes so long to fully heal the player, this effect is only valuable outside of battle.
 * Players will find that this implant is very useful during the Dead Money add-on because of the short supply of Stimpaks.
 * Waiting 1 minute in game will restore 12 HP.
 * Note that individual limb health is not affected by the regeneration; these must still be healed by normal means.

Behind the Scenes

 * Monocytes are a form of white blood cell (leukocytes) which react to inflammation signals and differentiate into infection-fighting cells to protect the body from disease.
 * The full name of the implant is PHOENIX Monocyte Breeder implant. Because you restore health over time, theoretically if you don't take damage too fast you can't die. Phoenix is a reference to the Greek mythical bird. It has several different versions but most say it was an immortal bird that when it died would burn to ashes and rise again from them, unable to be killed.