December 18, 2013; 7:58 PM ET
Warmer air will work into Boston later this week into the weekend. However, episodes of rain, drizzle and fog will tag along. more >
Rain possible Friday afternoon through Sunday afternoon
The sheer number of people, their interactions with animals and ecosystems, and the increase in international trade and travel are all factors that will likely change the way humanity deals with preventing and treating epidemics, experts say.