Baltimore classification
The Baltimore classification scheme, the most commonly used, was developed by Nobel Prize-winning biologist David Baltimore in the early 1970s. The scheme groups viruses according to how the mRNA is produced during the replicative cycle of the virus, in addition to the differences in morphology and genetics.
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"OpenStax College, Biology. November 8, 2013."
http://cnx.org/content/m44595/latest/?collection=col11448/latest
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