Federation, Spain, Sweden, United Kingdom, Belgium, Egypt, and United Arab Emirates3. Different from MERS-CoV but similar to SARS-CoV, 2019-nCoV can cause human-to-human transmission, and its intermediate host that leads to the current human infection and outbreak is still under investigation.

Genome of Emerging Human Coronaviruses, as Well as Structure and Function of Their Key Proteins
The human CoVs are enveloped viruses with a positive-sense, single-stranded RNA genome. They are 80–160 nm in diameter. Like other CoVs, human CoVs contain the largest viral genome [27–32 kilobase pairs (kb)] among the RNA viruses, and the