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.
Several different tests can be used to screen for colorectal cancers. These tests can be divided into: 1  Tests that can find both colorectal polyps and cancer: These tests look at the structure of the colon itself to find any abnormal areas.2  This is done either with a scope inserted into the rectum or with special imaging (x-ray) tests.olorectal cancer cells often contain DNA mutations (changes) in certain genes. Cells from colorectal cancers or polyps with these mutations are often shed into the stool, where tests may be able to detect them. Cologuard â¢ , the test currently available, also tests for blood in the stool.