Diarrhoea(Note) is a tier 3 symptom, unlocked after Vomiting or Pulmonary Oedema. The pathogen becomes more active in the host's digestive tract, allowing transmission through feces. The loss of water can cause fatal dehydration. Poor countries become 0.05% more vulnerable to infection.
- When combined with the Sneezing symptom, the Oops symptom combo is formed, which slows cure research and draws more attention to the disease. If combined with the Insanity symptom, the Public Defecation symptom combo is formed, which increases infectivity but draws more attention to the disease.