First aid kit

First aid kits (or "med kits") can be found throughout the game and in first aid stations. They take 5 seconds to use and restore 80% of the damage that survivor has taken based on their health not including temporary health. This healing will override temporary health. For example, a survivor with 30hp but has temporary health of 60hp due to pain pills, will be healed for 56hp back up to 86hp, with no temporary health.

It is possible for first aid kits to spawn aside from safe rooms and the finales of campaigns. However, the chances of this happening is extremely rare: if one does spawn, it will more than likely be the one and only extra in the whole campaign.