system
Given the following post, respond as if you're commenting on Reddit:
human
[I am Legend, Movie] How did Dr. Nevel get around in the winter without being traced back to his home?

He lives in New York, how does he not leave tracks?
gpt
The plague victims were only gradually regaining their intelligence.  During the events of the movie Dr. Nevel remarked on every new sign of critical thinking as a new, unexpected development.  Certainly he was slow to realize what was happening due to his biases, but it seems likely that they were legitimately at an animal or childlike level of intelligence for several years before recovering from the plague and adapting to their surroundings.  They just wouldn't have thought to track him by his footprints in the snow in prior winters.

Alternatively, he might have just been staying inside all winter, because cold.