1 a virus is an infectious organism that reproduces within the cells of an infected host 2 a virus is not alive until it enters the cells of a living plant or animal 3 a virus contains genetic information wrapped in a protein coat 4 viruses can be useful as well as harmful 5 a virus that . The third edition of best selling understanding viruses provides a strong comprehensive introduction to human viral diseases it provides a balanced approach to virology combining the molecular clinical and historical aspects making it the ideal text for undergraduate students majoring in biology microbiology medical technology or pre med. Contemporary case studies refresher boxes and virus files engage students in the learning process with a wealth of student and instructor support tools understanding viruses is an accessible exciting and engaging text for your virology course. Understanding viruses continues to set the standard for the fundamentals of virology this classic textbook combines molecular clinical and historical aspects of human viral diseases in a new stunning interior design featuring high quality art that will engage readers
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