The infected

Types of infected

The ordinary infected and the special kinds. Sight is how far one notices you in daylight; hearing multiplies how far every noise you make carries to it. Share is how often each special turns up among specials.

Type	Health	Pace	Sees you at	Hearing	Damage	Head hits to drop	What it does	May carry	Share of specials
Walker	260	Shambles	125 ft	x1	x1		The ordinary infected.
Runner	180	Sprints	213 ft	x1.3	x1		Faster and keener than a walker, but easier to put down.
Bull	650	Walks fast	148 ft	x1	x2.4	2	Charges from 23 to 66 ft away and knocks you down for 3 seconds. It wrecks vehicles 3 times as fast.	Weapon PartsMetal PlateSteel Plate (III)Bone	21%
Springer	220	Sprints	197 ft	x1.4	x1.2		Leaps 8 to 18 ft, pins you for 2.6 seconds and does 18 damage on landing.	Adrenaline ShotSpringsSinewInfected Tissue	28%
Swell	300	Shambles	115 ft	x1	x1		Bursts 1.2 seconds after you come within 7 ft 10 in: 30 damage out to 20 ft and 8% to 16% infection.	ChemicalsAntibioticsBloom SporesInfected Tissue	21%
Crier	200	Runs	180 ft	x1.6	x0.6		Screams when it sees you within 148 ft. Every infected within 295 ft hears it and 3 to 5 more come. It keeps 39 ft away from you.	ElectronicsBatterySpeakerBroken Phone	14%
Chorister	420	Walks fast	164 ft	x1.2	x0.8		Stands back 46 ft and gets up to 2 fallen infected within 72 ft back on their feet, every 12 seconds.	Wild HerbsAntiviralScrip	7%
Beeper	240	Walks fast	131 ft	x1.2	x0.7		Clicks as it walks, faster once it has your scent. It splits 9 to 15 seconds after you come within 92 ft, on contact, when it dies, or at once when you hit it in the chest or throat. The spore cloud spreads to 25 ft across, drifts with the wind and lasts 24 to 36 seconds: up to 3 damage and 0.5% infection a second inside it unmasked, and it chokes the other infected too.	Bloom SporesInfected Tissue	10%

By day about 12% of the infected are runners. About 8% are a special kind, more where the danger is higher.

A body stays on the ground to search for 90 seconds.

Day, night and their senses

What changes how easily the infected find you.

How far noise carries

The distance at which an ordinary infected hears each sound in calm, dry weather. A type's hearing multiplies it, and walls and floors dampen it. Each weapon's own noise is on its page.

Sound	Heard within
Crouch-walking	8 ft
Standing still	10 ft
Whispering on voice chat	13 ft
Hunting Crossbow	20 ft
Walking	23 ft
Air Rifle	33 ft
Pneumatic Nail Gun	39 ft
Talking on voice chat	46 ft
Running	49 ft
Sprinting	82 ft
A suppressed shot	92 ft
VSS Suppressed Rifle	92 ft
AS Val	92 ft
An idling engine	98 ft
Shouting on voice chat	154 ft
Bottle-Can Rifle	230 ft
Pistol shot	312 ft
Submachine gun shot	361 ft
A horn	427 ft
Shotgun blast	459 ft
Rifle shot	492 ft
Machine gun shot	558 ft
Sniper rifle shot	656 ft
An explosion	853 ft

A moving vehicle adds 1.8 ft for every mile per hour of speed, and up to 82 ft more at full revs.