Fungus

Fungus
Is a Random Event that happens inside the basement. 
==Defense==
There are two ways to fully eliminate the fungus: 
# Using soap to disinfect the fungus. 
# Closing all three vents to starve the area of air, causing the fungus to rapidly die. 
Using soap only gets rid of a single patch of fungus. If it has spread, it will take up to four additional bars of soap depending on the level of spread, making it intensive on resources. Closing all the vents doesn't cost anything, although it will deal a fair amount of damage to anybody currently inside the vault, so having more allies makes this option more punishing. 
== Tips ==
* If you have allies, you can coordinate closing and opening two vents simultaneously to minimize the health loss. 
* The thirty seconds between preparing for an expedition gives you immunity to oxygen loss from the vents, allowing you to clear it out without taking any damage.