Identify a current health issue of interest to you e.g diabetes, HIV/AIDS, heart disease etc. On the basis of current epidemiologic evidence, explain the factors that have contributed to the following: the observed trend in mortality rates for this disease, the changes in survival; the changes in incidence. A key concept in epidemiology is that of the levels of prevention.  As a community health nurse, describe primary, secondary, and tertiary prevention interventions related to this health issue.  Are there modifiable factors, such as health behaviors that lend themselves to better prevention efforts?