“You can catch a cold from being cold or exposed to cold weather.”

The idea that chilly temperatures directly cause a cold is a long-standing misconception, deeply ingrained in popular culture and often passed down through generations. This belief likely stems from simple observation: people tend to get sick more often during colder months, leading to a natural, albeit incorrect, assumption of cause and effect. Before the advent of modern microbiology, understanding the true nature of illness was limited, and environmental factors were often blamed for ailments.

However, scientific evidence clearly shows that colds are caused by viruses, primarily rhinoviruses, not by exposure to cold air itself. You can only catch a cold by coming into contact with these viruses, usually through airborne droplets from an infected person's cough or sneeze, or by touching contaminated surfaces and then your face. While cold weather doesn't directly cause illness, it can play an indirect role. For instance, cold air can dry out nasal passages, potentially making them more susceptible to viral invasion. Additionally, people tend to spend more time indoors in close proximity during colder months, increasing the likelihood of virus transmission from person to person.

This persistent myth endures because the correlation between cold weather and increased incidence of colds is undeniably strong. When someone goes outside without a coat in winter and subsequently develops a runny nose, it's easy to connect the two events, even if the actual cause was an invisible virus they encountered earlier. The immediate feeling of being cold can also be misinterpreted as the onset of illness, further reinforcing the misconception. Understanding that viruses are the true culprits helps us focus on effective prevention strategies, such as handwashing and avoiding sick individuals, rather than simply bundling up.