When humans blossomed from the evolutionary tree, it seems there was a cold wet nose and a wagging tail waiting for us.

CNN: Quest for man's best friend

Whether Hemingway is jumping on a trampoline or submerging herself in a cold stream, with her pointed nose and bouncy blonde hair, her message in the film is one of achieving mental well-being and overcoming one's own problems.

CNN: Hemingway family mental illness explored in new film

About 43 percent of the volunteers had signs of infection plus cold symptoms, such as a stuffy nose, cough, and sore throat.

CNN: Study: Can more sleep help fight off colds?

After that, the study subjects were quarantined for six days and given cold-virus-containing nose drops at a dose about 125 times the amount that it takes to infect cells in a laboratory.

CNN: Study: Can more sleep help fight off colds?