And why does it feel so much worse than a cold?
At the moment, there are no antiviral drugs that can treat or prevent rhinoviruses and enteroviruses.
Scientists have so far struggled to find ways of killing the bacteria which cause measles and the flu in the air before they enter our bodies.
A new molecule was found to stop cold viruses from hijacking human cells.
Clinical trials on a prospective type 1 immunization are set to begin next year.
Adults with divorced parents who remained in contact during their childhood, however, have no higher risk of catching a cold.