a form of coronavirus that causes a serious infectious illness with difficulty in breathing and sometimes death, and has been responsible for many cases of illness since 2019. SARS-CoV-2 is an abbreviation for Severe Acute Respiratory Syndrome Coronavirus 2.

The current COVID-19 pandemic is caused by a coronavirus called SARS-CoV-2. 目前的COVID-19大流行是由一种叫做严重急性呼吸综合征冠状病毒2的冠状病毒引起的。