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Coronavirus: coronavirus coronavirus cat, c oronavirus nl63 All you need to know about symptoms and risks What is coronavirus? According to the World Health Organization, coronaviruses are a family of viruses that cause illness ranging from the common cold to more severe diseases such as Middle East respiratory syndrome (MERS) and severe acute respiratory syndrome (SARS). These viruses are transmitted between animals and people. SARS, for instance, was believed to have been transmitted from civet cats to humans while MERS travelled from a type of camel to humans. Several known coronaviruses are circulating in animals that have not yet infected humans. A novel coronavirus, identified by Chinese authorities on January 7 and currently named 2019-nCoV, is a new strain that had not been previously identified in humans. Little is known about it, although human-to-human transmission has been confirmed. What are the symptoms? According to the WHO, signs of infectio...