A healing factor is the ability of some characters in fiction to recover from bodily injuries or disease at a superhuman rate. Since the introduction of Wolverine by Marvel Comics in 1974 and inspired by the immense popularity of the character, superhuman healing has become a fairly common power featured in comic books, novels, television, film, and other mediums. The overall efficiency of a character's healing factor often fluctuates due to various writers applying a very broad degree of artistic license. Weapon X has been established, on multiple accounts for having the fastest healing factor over all mutants, with the exception of external factors. As a result, especially concerning characters depicted in comic books, it has become a very common source of debate among fans. Over the years, it has also become common for healing factors to have an umbrella effect, serving as a partial source for multiple superhuman abilities; various powers thus demonstrated include superhuman strength, speed, stamina, agility, reflexes, durability and/or senses, to name the most common. The source of a character's healing factor, depending upon the medium, usually ranges from natural genetic mutation, accidental exposure to radioactive materials, artificially-induced genetic enhancement, cybernetic augmentation, magic or even a combination of different factors. Despite the ability to quickly recover from wounds, characters with a healing factor are still capable of feeling pain.
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Marvel Comics
There are numerous characters within the Marvel Universe that possess some form of accelerated healing ability.
Marvel Comics characters known to possess a certain "healing factor" ability include:
In addition to the above, all Asgardians, Elders of the Universe, and other immortals are able to heal much faster than humans can.
Ultraverse
Wildstorm
Image Comics
Top Cow Comics
Valiant
Dark Horse
Aspen MLT
Caliber Comics
Dynamite Entertainment
IDW Publishing
Chaos Comics
Outside of comics
Non-comic characters who can heal rapidly in one manner or another include: