SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
Current Opinion in Virology is a new systematic review journal that aims to provide specialists with a unique and educational platform to keep up to date with the expanding volume of information published in the field of virology. It will consist of 6 issues per year covering the following 11 sections, each of which is reviewed once a year:
• Emerging viruses: interspecies transmission • Viral immunology • Viral pathogenesis • Preventive and therapeutic vaccines • Antiviral strategies • Virus structure and expression • Animal models for viral diseases • Engineering for viral resistance • Viruses and cancer • Virus vector interactions
There is also a section that changes every year to reflect hot topics in the field.
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