Wuhan Coronavirus (2019-nCoV) is the 7th known human coronavirus.

Other six are:

[1] Human coronavirus 229E (HCoV-229E)

[2] Human coronavirus OC43 (HCoV-OC43)

[3] SARS-CoV

[4] Human coronavirus NL63 (HCoV-NL63, New Haven Coronavirus)

[5] Human coronavirus HKU1

[6] Middle East respiratory syndrome coronavirus (MERS-CoV)

Reference:
Callaway E.2020. “China coronavirus: labs worldwide scramble to analyse live samples.” Accessed February 03,2020. https://www.nature.com/articles/d41586-020-00262-7
 
Fox D. 2020. “What you need to know about the novel coronavirus.” Accessed February 03,2020. https://www.nature.com/articles/d41586-020-00209-y

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