A likely candidate for the origin for Sars-Cov-2 is the Level 4 Bio secure lab in Wuhan where scientists were conducting research into Coronaviruses from bats from several hundred Km away and where a previous research project had involved a gain-of-function experiment – (manipulating a virus to make it more infectious to humans for valid but controversial research purposes).
A second theory is that it could have jumped from bats to humans almost certainly via an intermediary animal. (Bats are so far genetically removed from humans that an intermediary animal is much more likely than direct transfer). Wuhan animal market has been canvassed as a likely source though there is some evidence which seems to suggest that it was not the epicentre of the epidemic. The supposed intermediary animal has yet to be identified credibly though there was an organised effort in China to point to pangolins (but this is not accepted as established).
Attentive and scientifically literate readers will note that I am discussing theories. No one knows – these are just theories and one can weigh them up, consider which way the evidence tends and come to a provisional conclusion. The fact is that right now there isn’t much concrete and definitive evidence for either the lab theory or the transfer from bats via an intermediary animal to humans theory other than from genetic analysis. The majority of virologists seem to believe that Sars-Cov-2 does not show signs of having been engineered in a lab. But not all.  I am struck by the coincidence of the outbreak occurring just a few Km from a lab where controversial research had been previously conducted into just this type of virus, which occurs naturally some hundreds of Km away, and by the existence of well-documented efforts by the Chinese authorities to prevent a free investigation into the origins either by journalists (a BBC team was interfered with) or by scientists (some scientists on the WHO mission have said that they were not provided with full data).
Other significant voices have argued for the likelihood of the lab origin. This is David Asher a US official who investigated the matter for the State Department. He says that there was an early cluster – workers from the Biolab. He raises the possibility that the virus was part of a military research programme. Sky News also reports (not David Asher) that a key database from the Wuhan Institute of Virology was taken offline in 9/2019. The Institute claims that this was due to hacking attempts. Alternatively it reflects an early crisis at the lab. The US State Departments belief that there was an early outbreak amongst lab staff is also reported by the Daily Telegraph. The full State Department document is here.
I’m interested in how the liberal press is working so (so) hard to squash the lab theory and I wonder why this is. This, is an example of this in the Guardian:
The origin of the pandemic has become a political football with some, including Dr Robert Redfield, a former director of the CDC, suggesting without evidence the virus escaped a laboratory in Wuhan, China.
The phrase here “suggesting without evidence” is the one they have settled on to try to discredit this theory. It is widely used and deployed against anyone who suggests the lab as the origin for Sars-Cov-2. Let’s look at what Dr Robert Redfield actually said. (After all, he is a former director of the US Center for Disease Control and Prevention, and a former University professor of virology, so not some kind of fringe loon). He said: “I am of the point of view that I still think the most likely aetiology of this pathogen in Wuhan was from a laboratory, escaped. The other people don’t believe that. That’s fine. Science will eventually figure it out” 
He didn’t “suggest without evidence”. He simply expressed his view that of the competing theories for the aetiology of Sars-Cov-2 the lab theory is the most likely. Scientists deal with theories and Dr Redfield is simply saying that this is the theory he favours – explicitly acknowledging that he could turn out to be wrong. I.e. he demonstrates that he understands how science works.
It is possible that the Guardian simply doesn’t understand how science works. (How theories can be be developed. How a scientist can favour one theory while still being open to an alternative theory being proved when all the evidence is in). But the systematic insistence with which they try to misrepresent all such theorizing tells me that it isn’t just intellectual clumsiness but that someone at a political-editorial level has decided that the line must be to suppress the lab theory. I’m interested in why. (And who is behind it).
One highly unlikely theory for the origin of Sars-Cov-2 is something to do with it being imported into China in chilled food. This theory has even found its way into the current WHO report – advocated for by Chinese members of the ‘investigation’ team. Its function is to spread out and dilute the lab theory. The Guardian plays the role asked of it by China:
While concluding that the two least likely hypotheses for the emergence of the deadly virus – a leak from a lab (pushed by senior Trump officials) and being introduced via frozen food from outside (promoted by China)
Chinese officials will be delighted with the Guardian’s reporting. They have equated the highly credible lab theory with this highly dubious claim about chilled food and thus managed to discredit the lab theory.
In the same report the Guardian also claims that Mike Pompeo – who has raised the possibility of the lab origin – has done so “without evidence”. But this is not true – unless ‘evidence’ means a signed confession and a vial of the engineered virus. The State Department in the dying days of the Trump Presidency published a detailed paper (also linked to above) in which they raise the possibility of the lab being the origin. (The paper remains on the State Department web site under the new President). It is worth noting that no direct accusation is made; simply the two leading theories (lab origin and animal origin) are discussed. “The virus could have emerged naturally from human contact with infected animals, spreading in a pattern consistent with a natural epidemic. Alternatively, a laboratory accident could resemble a natural outbreak if the initial exposure included only a few individuals and was compounded by asymptomatic infection.” The document reviews the evidence of cover-up and other factors such as the early cluster of sick lab workers. Together these factors do indeed give rise to serious questions. There is a lot of circumstantial evidence here.
One possible reason why the liberal press is working in overdrive to squash the lab theory may be that it is associated with Trump.  Though for me that explanation doesn’t seem to quite explain everything.