The term “common cold” is a bit of a misnomer
Common implies that there’s a single ordinary pathogen to blame for your runny nose, coughing, and mild fatigue. Actually, there’s a huge array of viruses—more than 200 of them—that induce colds, each with its own means of evading your body’s defenses. For this reason alone, it’s unlikely that a catchall “cure for the common cold” will ever be found. These are crazy cold symptoms you probably never knew about.
The chilly part is complicated
As for the “cold” part, well, it’s complicated. Scientists don’t know for sure whether low temperatures affect a virus’s pathogenicity, but they do believe that colds are more prevalent in winter in part because we tend to spend more time indoors, in close quarters with infected people and surfaces.