"People tend to congregate and be together and the way the common cold virus is transmitted from one person to another is through handshakes,through sneezing, or coughing on one another."
VOA: special.2011.04.20
The man was coughing and bleeding.
VOA: special.2011.05.31
They have also been linked to mucus secretion and maybe even thecoughing associated with the disease.