As you progress through Subnautica you will eventually be informed that you have been infected with a deadly bacteria.
The player is first informed of their infection by the energy core at the deep end of the Quarantine Enforcement Platform.
As the player progresses into late game the infection spreads, causing glowing green pustules to form on the hands.
As a result of this increased infection, Warpers will start to become hostile toward the player, whereas they may have initially kept to themselves.
You have been infected with a previously unknown, waterborne bacterium. It is currently multiplying in your bloodstream. Estimated incubation time: 2 weeks.
Your immune system is currently combating the infection at low efficiency. You may already be experiencing flu-like symptoms and skin irritation. These will likely be exacerbated as the bacterium takes hold.
Your immediate priority should be abatement and eradication of the infection.
Recommended steps:
– Salvage further alien research data on a possible vaccine
– Investigate the mechanisms which have enabled the indigenous ecosystem to inhibit the symptoms of the infection