1What condition is characterized by the inflammation of the liver and other tissues that can be caused by a viral infection or drug abuse?
2There are several means of promoting public health. Which of the following is not one of those means?
3prevents the dissipation of pollutants by normal air currents.
4The immune system consists of the skin, protective secretions, the inflammatory response, and phagocytes.
5What is the leading cause of water contamination in countries without water treatment plants?