At the first sign of a cold or flu, you may wonder how it happened -- especially if you've taken steps to avoid germs. Here's exactly how you get sick, and what you need to know to protect yourself next time: https://wb.md/2OSoCbC | WebMD

Cold weather can be life-threatening. If you can’t avoid being outside, remember to follow these 3 steps and tell someone where you’re going. weather.gov/cold #WinterSafety | U.S. National Weather Service (NWS)