Millions of Americans are dealing with snow and icy conditions during holiday travel. NBC News’ Jesse Kirsch details how travelers are dealing with the rush and delays.

More than 100 million people are heading out the door for the holidays but brutally cold temperatures and hazardous travel conditions are already causing major problems for travelers. NBC’s Emilie Ikeda reports for TODAY.

A mixture of colder temperatures, lower humidity and more time spent indoors could explain the uptick in cold viruses during the winter holidays

You may have been told to bundle up before venturing outside in the winter, otherwise you'll "catch a cold." But are you actually more likely to get a cold when it's chilly out? Put simply, yes: The incidence of respiratory infections,

Sleep needs for most adults range from seven to nine hours per night, regardless of the season. However, it is common to feel like you’re sleeping more in winter.