The main duct is called the common bile duct. It is  common to the liver, gallbladder and farther down line, to the  pancreas as well. on the left side of your liver   It is on the right side of your body.
According to the article linked in the related links section below: A cold is contagious for at least a day before you come down with the symptoms. During that time you may be transmitting the cold virus to all of your buddies and co-workers even when you're feeling fine. Once you come down with the symptoms, a cold is contagious until the last of your symptoms go away.
Spreading pneumonia to others. If your pneumonia is caused by a virus or bacteria, you may spread the infection to other people while you are contagious. How long you are contagious depends on what is causing the pneumonia and whether you get treatment. You may be contagious for several days to a week.