Essay on Natural History and Spectrum of Disease

            A Natural History of disease timeline shows the states of susceptibility, subclinical, exposure of diseases that is pathologic variations, to take place in the onset symptoms. The clinical diseases are following through the usual time of diagnosis, through the recovery, and the death or disability. Now the cancer disease is selected, its exposure might be the factor, which initiates the process for examples the asbestos fiber and the components of the tobacco, like the lungs cancer. Moreover, it endorses a process like the estrogen on behalf of endometrial cancer. A clinical effect of the cancer of the Thyroid cancer and its incubations period is approximately 2-20 years or more then. The disease is not obvious in an incubation period, where the serval pathologic variations might be detected in the laboratory, screening methods as well as the radiographic. (Www.cdc.gov/, 2012)