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.
Again the question is pneumonia contagious depends on the exact germ which is the cause of infection. Many scientists are still unsure of when the period of contagion begins and finishes. Particular viruses become contagious up to three days before symptoms develop.Theoretically this means a person who has pneumonia can be contagious for approximately two weeks. But the contagion is worse when the person is suffering with serious symptoms.articular viruses become contagious up to three days before symptoms develop. Theoretically this means a person who has pneumonia can be contagious for approximately two weeks. But the contagion is worse when the person is suffering with serious symptoms.