Incubation Period. According to the CDC, although the incubation period can range from one to four days, the typical incubation period is two days. People can begin infecting others about one day before any symptoms of the virus appear, and are contagious for about a week after that.nfluenza is a highly contagious respiratory illness. According to the Centers for Disease Control and Prevention, every year between 5 and 20 percent of people in the United States get the flu.
Colon Cancer. There are five common colon cancer tests: colonoscopy, virtual colonoscopy, sigmoidoscopy, barium enema, and stool testing. Each has benefits and drawbacks, so it's best to ask your doctor which colon cancer test is appropriate for you. In the meantime, however, here's an overview of the most common types of colon cancer tests. During a colonoscopy, a doctor inserts a flexible tube (called a colonoscope) into your anus.
Polyps or tumours in the colon have blood vessels that can release a small amount of blood onto the stool when it passes by. Stool tests check for this occult (hidden) blood that you canât see with your eyes. Two types of stool tests are used in Canada to screen for colorectal cancer.Guaiac-based fecal occult blood test (gFOBT). Uses a chemical reaction on a paper card to find traces of blood in the stool.ther reasons for having blood in the stool. Having blood in your stool doesnât always mean that you have polyps or cancer. Blood may come from the colon or from other parts of the digestive tract, such as the stomach or anus. The bleeding can be caused by: 1  ulcers (sores on the lining of your digestive tract).