BSL laboratories

Throughout the COVID-19 pandemic, much airtime and social media space has been allocated to the lab leak vs. natural spillover dispute regarding the origins of SARS-CoV-2. To summarize briefly, the question is whether the pandemic was caused by a leak from a biosafety level (BSL) four lab in Wuhan, China, or whether it arose naturally as a consequence of a virus jumping from a bat to an animal and then to humans.