The virus responsible for the disease COVID-19 is:

COVID-19 is caused by the coronavirus named SARS-CoV-2, first identified in late 2019.

There is no virus called TB-CoV-2, since tuberculosis is a bacterial, not a coronavirus, disease.

SARS-CoV-1 caused the earlier 2003 SARS outbreak and is a different, related coronavirus.

H2N2 is an influenza virus subtype responsible for a past flu pandemic, not COVID-19.

SARS-CoV-2 spreads mainly through respiratory droplets and aerosols from infected people.

Its rapid worldwide spread led the World Health Organization to declare a pandemic in 2020.