Where did COVID actually come from?: Zoonotic

The pattern

A cook in Guangdong developed a fever in November 2002 after preparing wild game. Within months, SARS had infected 8,000 people. Scientists identified the civet intermediate host within four months. The wet markets were the laboratory.

MERS emerged from camels in Saudi Arabia. Ebola has spilled from fruit bats at least twenty-five times since 1976. HIV crossed from chimpanzees through bushmeat practices. The mechanism repeats: humans push into wildlife habitat, create conditions for close contact, a virus finds a new host.

The market data

The Huanan Seafood Market is the lab leak camp’s inconvenience. Genomic analyses in Science identified the market as the epicenter — two distinct lineages, A and B, both traced there, suggesting at least two independent spillover events. That pattern is exactly what zoonotic emergence looks like. A lab leak produces one lineage from one event.

The missing intermediate host is a real gap. Six years without identification is longer than typical. But the natural reservoir for Ebola was not demonstrated for nearly forty years. China shut down wildlife trade pathways in January 2020 before systematic sampling could occur. The crime scene was cleaned before investigators arrived.

We circled wagons too fast. The Lancet letter was not science. It was a PR operation disguised as consensus. We should have demanded Daszak’s recusal. We let the social dynamics of our field override the obligation to follow evidence. The credibility we lost was earned over decades of fieldwork.

Where we concede ground: We let institutional loyalty override scientific openness in 2020. That is the concession that costs us.

What would change our mind: The WIV’s offline database containing a SARS-CoV-2 progenitor, or DEFUSE-described experiments conducted despite denial.

Read the full synthesis: Where did COVID actually come from?