Scully calls Mulder, telling him that the contagion could spread into the population if the fugitives are not captured. The fugitives arrive at Elizabeth's house, where she tends to Steve in the late stages of his infection.
Scully calls Mulder and warns him about the potential for the contagion to spread among the populace unless the fugitives are captured.  The fugitives then reach Elizabeth's house, where she is tending to Steve as he succumbs to his infection.