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Symptoms can be evolved through the Symptons screen. Evolving a Symptom costs DNA points, but each evolution will make your pathogen increasingly deadly.

There are 6 symptoms available immediately, the others must be evolved after you have evolved a prerequisite symptom.

Image	Name	Effect	Base Cost	Prerequisite
	Nausea	Irritated stomach lining leads to discomfort. Slight chance of infection when kissing	2 DNA	N/A
	Coughing	Chance of infection by spreading pathogen into surroundings, especially in high density, urban areas	4 DNA	N/A
	Rash	The skin becomes blistered and painful, slightly increasing infectivity	3 DNA	N/A
	Insomnia	Inablity to sleep makes people irritable and less productive	2 DNA	N/A
	Cysts	Painful lumps containing pockets of the pathogen. Slight chance of bursting which can spread disease	2 DNA	N/A
	Anaemia	Decrease in red blood cells or haemoglobin in the blood can lead to hypoxia in the organs	2 DNA	N/A
	Vomiting	The expulsion of infected material through projectile vomiting increases the risk of infection	4 DNA	Nausea
	Pneumonia	Serious fluid build and discharge from the lungs. People in cold climates especially vulnerable	6 DNA	Coughing
	Sweating	The loss of fluid through sweating increases infection rates due to poor hygiene. More dangerous in cold countries	7 DNA	Rash