.

code/__DEFINES/~monkestation/virology.dm

@@ -47,3 +47,5 @@
 #define DISEASE_TRAUMA "trauma"
 #define DISEASE_DECLONING "decloning"
 #define DISEASE_ANXIETY "anxiety"
+
+#define DISEASE_DORMANT (1 << 3)

code/_globalvars/bitfields.dm

@@ -117,6 +117,7 @@ DEFINE_BITFIELD(disease_flags, list(
 	"CAN_CARRY" = CAN_CARRY,
 	"CAN_RESIST" = CAN_RESIST,
 	"CURABLE" = CURABLE,
+	"DORMANT" = DISEASE_DORMANT,
 ))
 
 DEFINE_BITFIELD(flags_1, list(

code/controllers/subsystem/processing/fastprocess.dm

@@ -12,4 +12,4 @@ PROCESSING_SUBSYSTEM_DEF(actualfastprocess)
 PROCESSING_SUBSYSTEM_DEF(pathogen_processing)
 	name = "Pathogen Cloud Processing"
 	wait = 1 SECONDS
-	stat_tag = "SP"
+	stat_tag = "PC"

code/game/data_huds.dm

@@ -112,7 +112,7 @@ Medical HUD! Basic mode needs suit sensors on.
 
 	for(var/thing in diseases)
 		var/datum/disease/D = thing
-		if(!(D.visibility_flags & HIDDEN_SCANNER))
+		if(!(D.visibility_flags & HIDDEN_SCANNER) || !(D.disease_flags & DISEASE_DORMANT))
 			if(!threat || get_disease_severity_value(D.severity) > threat) //a buffing virus gets an icon
 				threat = get_disease_severity_value(D.severity)
 				severity = D.severity

code/modules/jobs/job_types/_job.dm

@@ -173,6 +173,29 @@
 		for(var/i in roundstart_experience)
 			spawned_human.mind.adjust_experience(i, roundstart_experience[i], TRUE)
 
+	if(prob(15))
+		var/virus_choice = pick(subtypesof(/datum/disease/advanced)- typesof(/datum/disease/advanced/premade))
+		var/list/anti = list(
+			ANTIGEN_BLOOD	= 2,
+			ANTIGEN_COMMON	= 2,
+			ANTIGEN_RARE	= 1,
+			ANTIGEN_ALIEN	= 0,
+		)
+		var/list/bad = list(
+			EFFECT_DANGER_HELPFUL	= 1,
+			EFFECT_DANGER_FLAVOR	= 2,
+			EFFECT_DANGER_ANNOYING	= 2,
+			EFFECT_DANGER_HINDRANCE	= 2,
+			EFFECT_DANGER_HARMFUL	= 2,
+			EFFECT_DANGER_DEADLY	= 2,
+		)
+		var/datum/disease/advanced/disease = new virus_choice
+		disease.makerandom(list(50,90),list(10,100),anti,bad,src)
+
+		disease.disease_flags |= DISEASE_DORMANT
+		disease.spread_flags &= ~(DISEASE_SPREAD_AIRBORNE | DISEASE_SPREAD_CONTACT_FLUIDS | DISEASE_SPREAD_CONTACT_SKIN)
+
+		spawned.infect_disease(disease, TRUE, "Random Dormant Disease [key_name(src)]")
 
 /datum/job/proc/announce_job(mob/living/joining_mob, job_title)
 	if(head_announce)