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.
The removal of precancerous polyps during colonoscopy inhibits their progression to cancer. Widely available screening tests such as the fecal occult blood test (FOBT), sigmoidoscopy, and colonoscopy are associated with a decrease in colorectal cancer mortality.arium enema has the advantage of imaging the entire colon. However, recent evidence has suggested that it is inaccurate for detecting polyps and early cancers and suboptimal for colorectal cancer screening or surveillance.