A natural emergence is still possible, but COVID-19 has a genetic footprint that has never been seen before in a natural coronavirus and suggests the virus originated in a lab, say two U.S. experts.
Dr. Steven Quay and Richard Muller made the assertion Sunday in an opinion piece in the Wall Street Journal and based it on the genomic sequencing patterns of COVID-19 and large discrepancies in its genetic diversity compared to the other coronaviruses responsible for SARS and MERS.
