SARS originated in Guangdong province , southern China and by the time it had been brought … Severe Acute Respiratory Syndrome (SARS) is a disease that first appeared in humans in November 2002.

SARS-CoV-2 is a positive-sense single-stranded RNA virus. It is contagious in humans and is the cause of the coronavirus disease 2019 (COVID-19). In a sample of UK adults with mild-moderate ...