Pneumonia

Pneumonia
Info	Serious fluid build and discharge from the lungs. People in cold climates especially vulnerable
DNA cost	3
Severity increase	Slight
Lethality	None (Slight in Smallpox and VS)
Infectivity increase	Average; Great in Cold climates
Next Symptom	Pulmonary Fibrosis, Pulmonary Oedema
Previous symptom	Coughing

Pneumonia is a tier 2 symptom. It causes serious fluid build in the lungs. It is great for infecting people in cold climates. In the Black Death scenario, the ability Pneumonic plague is an equivalent.