According to WHO, the official name of the virus responsible for Covid-19 disease is

According to the World Health Organization (WHO) and the International Committee on Taxonomy of Viruses (ICTV), the official name of the virus responsible for the COVID-19 pandemic is Severe Acute Respiratory Syndrome Coronavirus 2 ($\text{SARS-CoV-2}$). COVID-19 is the name of the disease caused by this virus.