[MIRROR] Better Viro (#9421)

Co-authored-by: Guti <32563288+TheCaramelion@users.noreply.github.com>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -19,7 +19,7 @@ var/global/list/image/splatter_cache=list()
 	blood_DNA = list()
 	var/basecolor="#A10808" // Color when wet.
 	var/synthblood = 0
-	var/list/datum/disease2/disease/virus2 = list()
+	var/list/datum/disease/viruses = list()
 	var/amount = 5
 	generic_filth = TRUE
 	persistent = FALSE
@@ -242,7 +242,7 @@ var/global/list/image/splatter_cache=list()
 	icon_state = "mucus"
 	random_icon_states = list("mucus")
 
-	var/list/datum/disease2/disease/virus2 = list()
+	var/list/datum/disease/viruses = list()
 	var/dry = 0 // Keeps the lag down
 	var/sampled = FALSE
 
@@ -253,11 +253,10 @@ var/global/list/image/splatter_cache=list()
 //This version should be used for admin spawns and pre-mapped virus vectors (e.g. in PoIs), this version does not dry
 /obj/effect/decal/cleanable/mucus/mapped/Initialize()
 	. = ..()
-	virus2 |= new /datum/disease2/disease
-	virus2[1].makerandom()
+	viruses |= new /datum/disease/advance
 
 /obj/effect/decal/cleanable/mucus/mapped/Destroy()
-	virus2.Cut()
+	viruses.Cut()
 	return ..()
 
 #undef DRYING_TIME

code/game/objects/effects/decals/Cleanable/misc.dm

@@ -113,7 +113,7 @@
 	icon = 'icons/effects/blood.dmi'
 	icon_state = "vomit_1"
 	random_icon_states = list("vomit_1", "vomit_2", "vomit_3", "vomit_4")
-	var/list/datum/disease2/disease/virus2 = list()
+	var/list/datum/disease/viruses = list()
 
 /obj/effect/decal/cleanable/tomato_smudge
 	name = "tomato smudge"