The exact origin of SARS-CoV-2, the virus that causes the disease COVID-19, remains unknown. Many scientists think that the virus likely originated in bats and then jumped to humans either directly or indirectly, through contact with an animal. Such zoonotic transfers have happened before with the coronaviruses responsible for SARS and MERS.
A paper published in Science in July 2022 analyzed the available evidence and implicated the wildlife trade and the Huanan Seafood Wholesale Market in Wuhan,