This movie used to play on WSVN 7, Miami, FL's local Fox station, a lot during its late night movies either in the late 80s or early 90s.
The setting is some kind of biological lab, and there was an accident of some sort. The two protagonists (a male and a female) must escape with their lives, while avoiding the contamination.
If I recall correctly, the contaminant/virus/whatever was "plant-like", insofar as it would turn people into plant-like mutants. (This is NOT swamp thing, another WSVN7 staple during that time period). But I could be misremembering this detail.
The movie MIGHT be related to
But I don't necessarily remember the snowy field.