Abstract: In general, cancer incidence increases with age. However some cancers, such as breast cancer, become indolent in the aged women due to both the "seed" (well differentiated cancer cell) and "soil" (reduced production of estrogen - growth factor for breast cancer cells) effects. Prevention and treatment of cancer in an aged population are discussed. ... Read more

Abstract: Cancer incidence rate was observed to be accelerating or even paradoxically declining among the oldest ages. This seemingly unlikely and contradictory phenomenon is possibly due to the "somatic aging" process. Aging slows down the rates of metabolism, cell proliferation, and so on. The slower-than-normal pace of accumulation of mutations and slower rate of blood-vessel formation (angiogenesis) reduce the occurrence and growth of cancer. ... Read more

The first large-scale epidemiology study of SARS is reported in Lancet by a coalition led by Drs. Christl Donnelly, Roy Anderson and their colleagues from Imperial College London, UK, the University of Hong Kong, and the Department of Health in Hong Kong. The severity and mortality rates were worse than initially estimated.

They studied 1,425 SARS cases from Hong Kong up to April 28, 2003. The average incubation period of SARS (the time from infection to the onset of symptoms) was estimated to be 6.4 days; the average time from the onset of clinical symptoms to hospital admission varied from 3 ... Read more