Second Wind
The Second Wind Implant provides an emergency reserve of Health and Stamina which can revive a soldier from near-death, and provide time to find proper medical attention.
It is always active when installed and intialized. It is automatically triggered when the user's health drops below a certain critical level, and provides a one-shot boost of 25 Health and 25 Stamina, and then must reinitialize again.
Second Wind has the longest initialization timer of any implant.