diff --git a/Content.Server/Disease/Effects/DiseasePolymorph.cs b/Content.Server/Disease/Effects/DiseasePolymorph.cs
new file mode 100644
index 0000000000..7e3e60a549
--- /dev/null
+++ b/Content.Server/Disease/Effects/DiseasePolymorph.cs
@@ -0,0 +1,41 @@
+using Content.Server.Polymorph.Systems;
+using Content.Shared.Audio;
+using Content.Shared.Disease;
+using Content.Shared.Disease.Components;
+using Content.Shared.Polymorph;
+using Content.Shared.Popups;
+using Content.Shared.Sound;
+using JetBrains.Annotations;
+using Robust.Shared.Audio;
+using Robust.Shared.Player;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Disease.Effects
+{
+    [UsedImplicitly]
+    public sealed class DiseasePolymorph : DiseaseEffect
+    {
+        [DataField("polymorphId", required: true, customTypeSerializer: typeof(PrototypeIdSerializer<PolymorphPrototype>))]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public readonly string PolymorphId = default!;
+
+        [DataField("polymorphSound")]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public SoundSpecifier? PolymorphSound;
+
+        [DataField("polymorphMessage")]
+        [ViewVariables(VVAccess.ReadWrite)]
+        public string? PolymorphMessage;
+
+        public override void Effect(DiseaseEffectArgs args)
+        {
+            EntityUid? polyUid = EntitySystem.Get<PolymorphableSystem>().PolymorphEntity(args.DiseasedEntity, PolymorphId);
+
+            if (PolymorphSound != null && polyUid != null)
+                SoundSystem.Play(PolymorphSound.GetSound(), Filter.Pvs(polyUid.Value), polyUid.Value, AudioHelpers.WithVariation(0.2f));
+
+            if (PolymorphMessage != null && polyUid != null)
+                EntitySystem.Get<SharedPopupSystem>().PopupEntity(Loc.GetString(PolymorphMessage), polyUid.Value, Filter.Entities(polyUid.Value), Shared.Popups.PopupType.Large);
+        }
+    }
+}
diff --git a/Resources/Locale/en-US/disease/disease.ftl b/Resources/Locale/en-US/disease/disease.ftl
index ee30b59ebf..dc4d889593 100644
--- a/Resources/Locale/en-US/disease/disease.ftl
+++ b/Resources/Locale/en-US/disease/disease.ftl
@@ -11,3 +11,4 @@ disease-banana-compulsion = You really want to eat some bananas.
 disease-beat-chest-compulsion = {CAPITALIZE(THE($person))} beats {POSS-ADJ($person)} chest.
 disease-vomit = {CAPITALIZE(THE($person))} vomits.
 disease-think = You feel like you can't think straight.
+disease-polymorph = You feel your body twist and change form!
\ No newline at end of file
diff --git a/Resources/Prototypes/Diseases/infectious.yml b/Resources/Prototypes/Diseases/infectious.yml
index 2a6cc73b45..9cbb6896fa 100644
--- a/Resources/Prototypes/Diseases/infectious.yml
+++ b/Resources/Prototypes/Diseases/infectious.yml
@@ -118,35 +118,95 @@
   id: AMIV
   name: AMIV
   cureResist: 0.10
+  stages:
+    - 0
+    - 120
+    - 780
   effects:
+    # compulsion pop ups
     - !type:DiseasePopUp
       probability: 0.015
       type: Pvs
       message: disease-beat-chest-compulsion
       visualType: Medium
+      stages:
+        - 0
+        - 1
+        - 2
     - !type:DiseasePopUp
       probability: 0.03
       message: disease-banana-compulsion
       visualType: Medium
+      stages:
+        - 0
+        - 1
+        - 2
+    # Screeches - spreads disease
+    - !type:DiseaseSnough
+      probability: 0.01
+      snoughMessage: disease-screech
+      snoughSound:
+        collection: MonkeyScreeches
+      stages:
+        - 0
     - !type:DiseaseSnough
       probability: 0.02
       snoughMessage: disease-screech
       snoughSound:
         collection: MonkeyScreeches
+      stages:
+        - 1
+    - !type:DiseaseSnough
+      probability: 0.04
+      snoughMessage: disease-screech
+      snoughSound:
+        collection: MonkeyScreeches
+      stages:
+        - 2
+    # monkey accent chance when speaking
     - !type:DiseaseGenericStatusEffect
-      probability: 0.3
+      probability: 0.2
       key: Stutter
       component: MonkeyAccent
+      stages:
+        - 1
+    - !type:DiseaseGenericStatusEffect
+      probability: 0.5
+      key: Stutter
+      component: MonkeyAccent
+      stages:
+        - 2
+    # asphyxiation damage, probably from all the screeching
     - !type:DiseaseHealthChange
       probability: 0.53
       damage:
         types:
           Asphyxiation: 1
+      stages:
+        - 1
+        - 2
+    # possible monkefication if ignored too long
+    - !type:DiseasePolymorph
+      probability: 0.000427 ## ~5% chance over 120 secs
+      polymorphId: AMIVMorph
+      polymorphMessage: disease-polymorph
+      polymorphSound: 
+        path: /Audio/Animals/monkey_scream.ogg
+      stages:
+        - 2
   cures:
     - !type:DiseaseJustWaitCure
-      maxLength: 1600
+      maxLength: 900
+      stages:
+        - 0
+        - 1
+        - 2
     - !type:DiseaseReagentCure
       reagent: BananaHonk
+      stages:
+        - 0
+        - 1
+        - 2
 
 - type: disease
   id: BleedersBite
diff --git a/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml b/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
index 3c21bb71d3..df72353925 100644
--- a/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
+++ b/Resources/Prototypes/Entities/Mobs/NPCs/animals.yml
@@ -844,6 +844,8 @@
   - type: Bloodstream
     bloodMaxVolume: 50
   - type: DiseaseCarrier #The other class lab animal and disease vector
+    naturalImmunities:
+      - AMIV
   - type: CanEscapeInventory
   - type: MobPrice
     price: 50
diff --git a/Resources/Prototypes/Polymorphs/polymorph.yml b/Resources/Prototypes/Polymorphs/polymorph.yml
index aec7946591..88a9a1b624 100644
--- a/Resources/Prototypes/Polymorphs/polymorph.yml
+++ b/Resources/Prototypes/Polymorphs/polymorph.yml
@@ -43,3 +43,12 @@
   entity: SuperSynthesizerInstrument
   forced: true
   inventory: Drop
+
+- type: polymorph
+  id: AMIVMorph
+  entity: MobMonkey
+  forced: true
+  inventory: Transfer
+  transferName: true
+  revertOnCrit: false
+  revertOnDeath: false
\ No newline at end of file