A team of scientists say it is "beyond reasonable doubt" the Covid pandemic started with infected animals.

A team of scientists say it is “beyond reasonable doubt” the Covid pandemic started with infected animals sold at a market, rather than a laboratory leak.

They were analysing hundreds of samples collected from Wuhan, China, in January 2020.

The results identify a shortlist of animals – including racoon dogs, civets and bamboo rats – as potential sources of the pandemic.

Despite even highlighting one market stall as a hotspot of both animals and coronavirus, the study cannot provide definitive proof.

The samples were collected by Chinese officials in the early stages of Covid and are one of the most scientifically valuable sources of information on the origins of the pandemic.

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Their analysis was published last year and the raw data made available to other scientists. Now a team in the US and France says they have performed even more advanced genetic analyses to peer deeper into Covid’s early days.

  • The Octonaut@mander.xyz
    23·
    3 months ago

    Wasn’t this disproven already? Covid has been detected in human waste matter samples from Autumn 2019 in Italy.

    Overall, the results of this blind retesting of a selected set of samples indicate the presence of SARS-CoV-2 antibodies in some SMILE samples collected in the prepandemic period. The oldest samples found positive for IgM by both laboratories were collected on 10 October 2019 (Lombardy), 11 November 2019 (Lombardy) and 5 February 2020 (Lazio), the latter with neutralizing antibodies. Two additional samples collected on 17 December 2019 (Campania) and 28 January 2020 (Lombardy) tested as IgG positive by VisMederi and positive for IgG S1 and IgG S1+NP by Erasmus. Additional IgM positive cases could have been detected also by Erasmus by lowering the cut-off of the commercial IgM assay. The older among these putative additional IgM positive samples was collected on 3 September 2019 in the Veneto region, one of the first and mostly severely affected COVID-19 regions.

    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8778320/

    • fine_sandy_bottom@lemmy.federate.cc
      4·
      3 months ago

      I don’t really understand what this is actually saying?

      Surely, if this were saying “covid started in italy” or “covid was around in 2019” that would rate more song and dance than a single obscure research paper?

      • Knock_Knock_Lemmy_In@lemmy.world
        92·
        3 months ago

        These findings do not at all suggest that the virus originated in Italy, but they endorse the idea that the virus was likely spreading in China before the first known cases and that could have been circulated by travelers given direct the connections between China and European and US countries, particularly the Northern West and East Italian regions, which are among the most industrialized and connected areas of Italy.

      • The Octonaut@mander.xyz
        4·
        3 months ago

        There’s a lot more than a single obscure research paper but that’s the best one in terms of science in my opinion. It was quite broadly covered news (in Europe at least?) when the virus was first found in waste water samples from Milan from the same period.

        We knew it was in Europe before 2020 all the way back in June 2020: https://www.reuters.com/article/business/healthcare-pharmaceuticals/italy-sewage-study-suggests-covid-19-was-there-in-december-2019-idUSKBN23Q1J8/

        By November 2020 it was pushed back as far as September 2019: https://newseu.cgtn.com/news/2020-11-17/COVID-19-was-spreading-in-Italy-by-September-2019-study-indicates-VuSqUttP8s/index.html

        As someone else replied, it isn’t saying Covid started in Italy, but rather that it definitely didn’t start because someone ate bat soup from a wet market in Wuhan in December 2019. Well, the science is just stating as a fact that Covid was in these samples from Italy in 2019. Everything else is inferred.

        It was 2020. We had people shouting about “the China Virus” and others defending the cultural importance of wet markets and others saying it was a bioweapon from a lab and others saying it didn’t exist at all.

        It seemed to suit absolutely nobody’s narrative that

        • it took longer to be detected than previously thought, and lots of doctors missed it
        • we don’t really know where it started exactly, and can’t really ever know without a concerted investigation of the same sort done in Italy
        • international travel and globalisation as well as illegal trade of exotic animals and their carcasses makes it all pretty much guesswork, since Indonesian civit poachers on Filipino boats in the South China Sea don’t submit wastewater samples
        • ultimately its source was inconsequential compared to how we actually responded and what we retained afterwards (nothing, it seems)