anchor.diff:  
   /datum/round_event/disease_outbreak/start()
   	var/advanced_virus = FALSE
  -	max_severity = 3 + max(FLOOR((world.time - control.earliest_start)/6000, 1),0) //3 symptoms at 20 minutes, plus 1 per 10 minutes
  +	max_severity = 3 + max(Floor((world.time - control.earliest_start)/6000),0) //3 symptoms at 20 minutes, plus 1 per 10 minutes
   	if(prob(20 + (10 * max_severity)))
   		advanced_virus = TRUE
   
  
positive.code: 		var/turf/T = get_turf(H)
  		if(!T)
  			continue
  		if(!(T.z in GLOB.station_z_levels))
  			continue
  		if(!H.client)
  			continue
  
negative.code: 		var/datum/disease/D
  		if(!advanced_virus)
  			if(virus_type == /datum/disease/dnaspread)		//Dnaspread needs strain_data set to work.
  				if(!H.dna || (H.disabilities & BLIND))	//A blindness disease would be the worst.
  					continue
  				D = new virus_type()
  				var/datum/disease/dnaspread/DS = D
  