Infections

* Still need at least 5 units of spaceacillin in your system for anything to happen.
* If germ_level is below a certain point, infection is cured instantly.
* Otherwise, it is reduced at a rate of 2 per second.
* If germ_level has reached level three (necrosis), 30 units of spaceacillin will be required in your system to prevent the infection from progressing
* Internal organ infections work similarly.