diff --git a/code/datums/elements/swabbable.dm b/code/datums/elements/swabbable.dm
index 18b88f50324..5059ad7635c 100644
--- a/code/datums/elements/swabbable.dm
+++ b/code/datums/elements/swabbable.dm
@@ -12,7 +12,7 @@ This element is used in vat growing to allow for the object to be
 	var/virus_define
 	///Amount of cell lines on a single sample
 	var/cell_line_amount
-	///Amount of viruses on a single sample
+	///The chance the sample will be infected with a virus.
 	var/virus_chance
 
 ///Listens for the swab signal and then generate a sample based on pre-determined lists that are saved as GLOBs. this allows us to have very few swabbable element instances.
diff --git a/code/modules/research/xenobiology/vatgrowing/samples/_micro_organism.dm b/code/modules/research/xenobiology/vatgrowing/samples/_micro_organism.dm
index 8cd13518a01..d0ad4963046 100644
--- a/code/modules/research/xenobiology/vatgrowing/samples/_micro_organism.dm
+++ b/code/modules/research/xenobiology/vatgrowing/samples/_micro_organism.dm
@@ -63,7 +63,7 @@
 		reagents.remove_reagent(i, REAGENTS_METABOLISM)
 
 	//Handle debuffing growth based on viruses here.
-	for(var/datum/micro_organism/cell_line/virus in biological_sample.micro_organisms)
+	for(var/datum/micro_organism/virus/active_virus in biological_sample.micro_organisms)
 		if(reagents.has_reagent(/datum/reagent/medicine/spaceacillin, REAGENTS_METABOLISM))
 			reagents.remove_reagent(/datum/reagent/medicine/spaceacillin, REAGENTS_METABOLISM)
 			continue //This virus is stopped, We have antiviral stuff
diff --git a/code/modules/research/xenobiology/vatgrowing/samples/_sample.dm b/code/modules/research/xenobiology/vatgrowing/samples/_sample.dm
index 65c861a70d9..8047e863fb4 100644
--- a/code/modules/research/xenobiology/vatgrowing/samples/_sample.dm
+++ b/code/modules/research/xenobiology/vatgrowing/samples/_sample.dm
@@ -16,7 +16,7 @@
 		var/datum/micro_organism/chosen_type = pickweight(temp_weight_list)
 		temp_weight_list -= chosen_type
 		micro_organisms += new chosen_type
-	if(virus_chance)
+	if(prob(virus_chance))
 		if(!GLOB.cell_virus_tables[virus_define])
 			return
 		var/datum/micro_organism/chosen_type = pickweight(GLOB.cell_virus_tables[virus_define])