How Viruses Are Classified
Everything from single-cell bacteria to human beings are part of the evolutionary tree of life. Viruses, however, get their own tree because they are generally considered to be non-living. Unlike bacteria, viruses cannot replicate themselves, unless they attach themselves to a living thing. Then it’s a whole different story. Viruses are divided into seven categories, using Roman numerals with extended orders, families, genera and species. The coronavirus, or more specifically COVID-19, belongs to the nido-virales order in category IV and is closely related to the viruses that caused the SARS and MERS outbreaks. It is far more serious than the influenza virus, spreading more easily with a death rate 10 times that of the seasonal flu. Learn more from Matt Baker of Useful Charts.