Severe acute respiratory syndrome coronavirus 2 ( SARS - CoV-2 ) caused the COVID-19 pandemic
that has been spreading around the world since December 2019 .
Severe acute respiratory syndrome coronavirus 2 ( SARS - CoV-2 ) caused the COVID-19 pandemic that has been spreading around the world since December 2019 .
Severe acute respiratory syndrome coronavirus 2 ( SARS - CoV-2 ) caused the COVID-19 pandemic that has been spreading around the world since December 2019 .