Thus far in the history of the United States there been three Presidential impeachment proceedings -- in 1868 against President Andrew Johnson for his removal of Secretary of War Edwin Stanton in violation of the Tenure of Office Act - 1974 against President Richard Richard Nixon for the Watergate coverup (106 years after Johnson) - 1998-99 against ...
Medical entomology. The discipline of medical entomology, or public health entomology, and also veterinary entomology is focused upon insects and arthropods that impact human health. Veterinary entomology is included in this category, because many animal diseases can jump species and become a human health threat, for example, bovine encephalitis.
Epidemiology is the study of the patterns, causes, and effects of health and disease conditions in defined populations.It is the cornerstone of public health, and shapes policy decisions and evidence-based practice by identifying risk factors for disease and targets for preventive healthcare.he term epidemiology appears to have first been used to describe the study of epidemics in 1802 by the Spanish physician Villalba in Epidemiologia EpidemiologÃ­a. Espanola espaÃ±ola epidemiologists also study the interaction of diseases in, a population a condition known as. a syndemic