Tutorial/Miasma Fog and Miasma Contamination

Toxic Miasma fog will appear along this path. Agents within it will suffer from contamination, and when the Miasma Contamination reaches its limit, all Agents in the squad will take DMG based on their current HP percentage.

Stay away from the toxic fog to gradually reduce contamination.
Approaching a Miasma Purifier will also quickly clear contamination.