From a global health viewpoint  howdoes HIV/AIDS fit into either the ecological/evolutionary model of disease or the political-economy model of disease?

What evolutionary changes need to occur for an animal pathogen to become a human pathogen?  Name some human infectious diseases that have an animal source

In the 1940s, the U.S. government was looking for a solution to a medical problem: the prevalence of sexually transmitted diseases (STDs) among soldiers. Several now-infamous government-funded studies used human subjects to research common STDs and treatments. In one such study, American researchers intentionally exposed more than 1300 human subjects in Guatemala to syphilis, gonorrhea, and chancroid to determine the ability of penicillin and other antibiotics to combat these diseases. Subjects of the study included Guatemalan soldiers, prisoners, prostitutes, and psychiatric patients—none of whom were informed that they were taking part in the study.  1) What type of Epidemiological Study does this fall under; Descriptive, Analytical, Retrospective, Observational, or Prospective. 2) Please explain why this study was ethical or unethical. 3) We discussed a similar tragic but famous study that happened in the U.S. (it took place in Alabama) in one of our lectures. What was the name and…

A study by Murray, C. J., & Lopez, A. D. (1996). Evidence-based health policy---Lessons from the Global Burden of Disease Study, what do you think are the critical implications to emerge from this study, is creating evidenced-based health policy a viable option in the global environment and what do think are the benefits and barriers to evidence-based health policy?