Index: binaries/data/mods/public/simulation/components/Damage.js
===================================================================
--- binaries/data/mods/public/simulation/components/Damage.js
+++ binaries/data/mods/public/simulation/components/Damage.js
@@ -236,7 +236,7 @@
  * @param {Object} data - the data passed by the caller.
  * @param {Object} data.strengths - data in the form of { 'hack': number, 'pierce': number, 'crush': number }.
  * @param {number} data.target - the entity id of the target.
- * @param {number} data.attacker - the entity id og the attacker.
+ * @param {number} data.attacker - the entity id of the attacker.
  * @param {number} data.multiplier - the damage multiplier.
  * @param {string} data.type - the type of damage.
  * @param {number} data.attackerOwner - the player id of the attacker.
@@ -258,6 +258,11 @@
 	if (targetState.killed)
 		this.TargetKilled(data.attacker, data.target, data.attackerOwner);
 
+	// do the status change, eg. poisoning
+	let cmpStatus = Engine.QueryInterface(data.target, IID_Status);
+	if (cmpStatus)
+		cmpStatus.StartEffect(data.attacker);
+
 	Engine.PostMessage(data.target, MT_Attacked, { "attacker": data.attacker, "target": data.target, "type": data.type, "damage": -targetState.change, "attackerOwner": data.attackerOwner });
 };
 
Index: binaries/data/mods/public/simulation/components/Status.js
===================================================================
--- binaries/data/mods/public/simulation/components/Status.js
+++ binaries/data/mods/public/simulation/components/Status.js
@@ -0,0 +1,42 @@
+function Status() {}
+
+Status.prototype.Init = function()
+{
+	this.isPoisoned = false;
+}
+
+Status.prototype.StartEffect = function(attacker)
+{
+	let cmpStatusEffects = Engine.QueryInterface(attacker, IID_StatusEffects);
+
+	if (!cmpStatusEffects || !cmpStatusEffects.poison)
+		return;
+
+	// TODO: multiple poision attacks may reset the duration
+	if (this.isPoisoned)
+		return;
+
+	this.isPoisoned = true;
+
+	let poison = cmpStatusEffects.poison;
+	this.duration = poison.duration;
+	this.damage = poison.damage;
+
+	let cmpTimer = Engine.QueryInterface(SYSTEM_ENTITY, IID_Timer);
+	this.timer = cmpTimer.SetInterval(this.entity, IID_Status, "ExecuteEffect", 0, poison.interval, null);
+}
+
+Status.prototype.ExecuteEffect = function()
+{
+	let cmpTimer = Engine.QueryInterface(SYSTEM_ENTITY, IID_Timer);
+	if (cmpTimer.GetTime(this.timer) > this.duration)
+	{
+		cmpTimer.CancelTimer(this.timer);
+		return;
+	}
+
+	let cmpHealth = Engine.QueryInterface(this.entity, IID_Health);
+	cmpHealth.Reduce(this.damage);
+};
+
+Engine.RegisterComponentType(IID_Status, "Status", Status);
Index: binaries/data/mods/public/simulation/components/StatusEffects.js
===================================================================
--- binaries/data/mods/public/simulation/components/StatusEffects.js
+++ binaries/data/mods/public/simulation/components/StatusEffects.js
@@ -0,0 +1,30 @@
+function StatusEffects() {}
+
+StatusEffects.prototype.Schema =
+	"<a:help>Handling effects like poisioning or burning attached to an entity.</a:help>" +
+	"<a:example>" +
+	"<Poison>" +
+		"<Duration>2000</Duration>" +
+		"<Interval>200</Interval>" +
+		"<Damage>5</Damage>" +
+	"</Poison>" +
+	"</a:example>"	+
+	"<optional>" +
+		"<element name='Capture'>" +
+			"<interleave>" +
+				"<element name='Duration' a:help='The duration of the status while the effect occurs.'><ref name='nonNegativeDecimal'/></element>" +
+				"<element name='Interval' a:help='Interval between the occurances of the effect.'><ref name='nonNegativeDecimal'/></element>" +
+				"<element name='Damage' a:help='Damage caused by the effect.'><ref name='nonNegativeDecimal'/></element>" +
+			"</interleave>" +
+		"</element>" +
+	"</optional>";
+
+StatusEffects.prototype.Init = function()
+{
+	this.poison = {};
+	this.poison.duration = +this.template.Poison.Duration;
+	this.poison.interval = +this.template.Poison.Interval;
+	this.poison.damage = +this.template.Poison.Damage;
+};
+
+Engine.RegisterComponentType(IID_StatusEffects, "StatusEffects", StatusEffects);
Index: binaries/data/mods/public/simulation/components/interfaces/Status.js
===================================================================
--- binaries/data/mods/public/simulation/components/interfaces/Status.js
+++ binaries/data/mods/public/simulation/components/interfaces/Status.js
@@ -0,0 +1 @@
+Engine.RegisterInterface("Status");
Index: binaries/data/mods/public/simulation/components/interfaces/StatusEffects.js
===================================================================
--- binaries/data/mods/public/simulation/components/interfaces/StatusEffects.js
+++ binaries/data/mods/public/simulation/components/interfaces/StatusEffects.js
@@ -0,0 +1 @@
+Engine.RegisterInterface("StatusEffects");
Index: binaries/data/mods/public/simulation/components/tests/test_Damage.js
===================================================================
--- binaries/data/mods/public/simulation/components/tests/test_Damage.js
+++ binaries/data/mods/public/simulation/components/tests/test_Damage.js
@@ -12,6 +12,7 @@
 Engine.LoadComponentScript("interfaces/Loot.js");
 Engine.LoadComponentScript("interfaces/Player.js");
 Engine.LoadComponentScript("interfaces/Promotion.js");
+Engine.LoadComponentScript("interfaces/Status.js");
 Engine.LoadComponentScript("interfaces/TechnologyManager.js");
 Engine.LoadComponentScript("interfaces/Timer.js");
 Engine.LoadComponentScript("Attack.js");
Index: binaries/data/mods/public/simulation/components/tests/test_Status.js
===================================================================
--- binaries/data/mods/public/simulation/components/tests/test_Status.js
+++ binaries/data/mods/public/simulation/components/tests/test_Status.js
@@ -0,0 +1,50 @@
+Engine.LoadComponentScript("interfaces/Health.js");
+Engine.LoadComponentScript("interfaces/Status.js");
+Engine.LoadComponentScript("interfaces/Timer.js");
+Engine.LoadComponentScript("interfaces/StatusEffects.js");
+
+Engine.LoadComponentScript("Status.js");
+Engine.LoadComponentScript("Timer.js");
+Engine.LoadComponentScript("StatusEffects.js");
+
+function testStatusChange()
+{
+	let target = 42;
+	let attacker = 43;
+
+	let cmpStatus = ConstructComponent(target, "Status");
+	let cmpTimer = ConstructComponent(SYSTEM_ENTITY, "Timer");
+	let cmpStatusEffects = ConstructComponent(attacker, "StatusEffects", {
+		"Poison": {
+			"Duration": 20000,
+			"Interval": 10000,
+			"Damage": 1
+		}
+	});
+
+	let health = 10;
+
+	AddMock(target, IID_Health, {
+		"Reduce": (amount) => { health -= amount; }
+	});
+
+	// damage scheduled: 0 sec, 10 sec, 20 sec
+	cmpStatus.StartEffect(attacker);
+
+	cmpTimer.OnUpdate({ turnLength: 1 });
+	TS_ASSERT_EQUALS(health, 9); // 1 sec
+
+	cmpTimer.OnUpdate({ turnLength: 8 });
+	TS_ASSERT_EQUALS(health, 9); // 9 sec
+
+	cmpTimer.OnUpdate({ turnLength: 1 });
+	TS_ASSERT_EQUALS(health, 8); // 10 sec
+
+	cmpTimer.OnUpdate({ turnLength: 10 });
+	TS_ASSERT_EQUALS(health, 7); // 20 sec
+
+	cmpTimer.OnUpdate({ turnLength: 10 });
+	TS_ASSERT_EQUALS(health, 7); // 30 sec
+}
+
+testStatusChange();
Index: binaries/data/mods/public/simulation/templates/template_unit.xml
===================================================================
--- binaries/data/mods/public/simulation/templates/template_unit.xml
+++ binaries/data/mods/public/simulation/templates/template_unit.xml
@@ -1,5 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Entity>
+  <Status/>
+  <StatusEffects>
+    <Poison>
+      <Duration>5000</Duration>
+      <Interval>1000</Interval>
+      <Damage>1</Damage>
+    </Poison>
+  </StatusEffects>
   <AIProxy/>
   <Armour>
     <Hack>1</Hack>