tickleandrose
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I have got an article that is more balanced.
https://www.ausdoc.com.au/news/story-aussie-doctor-whos-covid19-mission-china
AD: Was the team satisfied that SARS-CoV-2 didn’t escape from a Chinese lab? That still seems to be a widespread, and potentially explosive, suspicion.
Professor Dwyer: A range of hypotheses related to the origins of this virus have been raised and discussed, and to work these up you have to try and rank them as to their likelihood and look at the evidence to justify that ranking.
With the laboratory escape theory, there are a couple of issues.
One is that laboratory escape has occurred in a number of countries around the world, in China, Singapore, Russia, the US and the UK. Fortunately, it's fairly rare.
Generally, these occur in the context of the virus being grown in a culture in the lab, often in quite high amounts.
Unless you're growing the virus or doing experiments with a cultured virus, you tend not to have leaks.
We visited the main lab that people have been talking about — the Wuhan Institute of Virology — which is a very well-known and very good laboratory that does a lot of work with samples from bats and other animals.
We toured the lab — it was just a tour, of course — and saw the high-level biosecurity protocols.
It all looked perfectly fine.
We looked at the sort of work had they done with their staff health.
People who work in these biosecurity labs often will have blood collected each year and stored, and a physical examination takes place to make sure that everything's going OK.
They had tested all the blood collected for SARS-CoV-2 antibodies and didn’t find anything.
We also talked with the researchers doing the bat virus research at the lab.
There's one virus of people had been talking about a lot called RaTG13, which is a bat coronavirus that was detected in a cave in southern China. This is the one that is most closely related to SARS-CoV-2.
The point is they have a sequence of the virus, but they haven’t actually been able to culture the virus in the lab.
And even though the two are closely related, RaTG13 still too different to be the parent virus.
With this information in mind, we discussed this fully within the WHO team.
We felt that although we could never completely discount the viral lab escape hypothesis, we rated it as being extremely unlikely.
That doesn't mean that it's been completely discounted, we just rated other hypotheses as more likely to warrant further investigation.
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