What are the facts of the “COVID-19 lab leak” theory?

Jul 4, 21

In 2020, blood samples taken from miners thought to be infected with COVID-19 (before the pandemic) did not have antibodies against SARS-Cov

Between 2012 and 2015, an unknown respiratory disease hit several miners in Wuhan. But researchers reported that the blood samples of these workers tested negative for antibodies against SARS-Cov-2. This makes it unlikely the virus had been created and leaked at that time.