The SARS-CoV-2 virus has different genes from other coronaviruses that infect humans .
It is the seventh known coronavirus to infect people , after 229E , NL63 , OC43 , HKU1 , MERS-CoV , and SARS-CoV.Like SARS-CoV , 2019-nCoV is a member of the subgenus Sarbecovirus ( Beta-CoV lineage B ) .
Severe acute respiratory syndrome coronavirus 2