In the winter, your immune system is compromised because your body is working harder to keep you warm. This extra work takes energy away from the immune system’s other duties, such as resisting bacteria and viral attacks. While simply stepping outside into the cold without a jacket won’t cause a cold, the lowering of the body's core temperature suppresses immunity — which can lead to colds. During the fall and winter months, you’re also likely to spend more time inside rather than outside. Close contact with family members can cause colds, the flu and other viruses to spread easily. You can combat this by regularly washing your hands and sanitizing home surfaces, such as doorknobs and faucets.
