I had watched a movie a year ago and I can't remember the name or too many details. However it was a story about a small town well water being contaminated by some virus. The whole town had got the disease and this woman had figured out how it was transmitted and tries to flee with another man. The army is involved and tries to kill off the whole town, including the woman. At the end of the movie what i believe was the General gave her a glass of water to drink before allowing her to escape, she treked through the woods and made it to safety just to get a bloody nose too and realize she was infected. She died..the movie was over. HELP???