Virus is the pathogenic microbe that causes infections in human body. Virions are the virus particles which are consisted of two parts such as genetic material and protein coat. Viruses mainly affect the human immune system of the human body. Hepatitis virus is the common virus that degenerates the immunity of the body. Virulence is the capacity of the virus to infect the human system. Vaccination helps in preventing the infections caused by virus, as it produces the antibodies that are necessary in defense mechanism. The most common and well know lethal disease caused by human immune deficiency virus is AIDS. Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results. Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
Last date updated on July, 2014