More than two years after the kick off of theepidemicthe virus continues to unfold as research progresses. This Wednesday, May 11, the online scientific journal Nature published the summary of several studies that have highlighted the causes of intestinal symptoms.

Indeed, intrigued by several cases of vomiting and of diarrhea among those infected with covidseveral researchers have questioned these symptoms gastro-intestinal caused by what is nevertheless defined as a respiratory viral infection.

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Two teams of researchers from the University of Stanford (California, United States) and that of Innsbruck (Austria) have thus concluded that “fragments of SARS-CoV-2 could persist in the intestine for months after an initial infection”. Ami Bhatt, an oncologist and geneticist at Stanford, called these fragments the “ghosts” of the Covid. Which could contribute to what is now called the long covidthis severe form of Covid defined as “symptoms that persist beyond 12 weeks after an acute infection”.

In previous studies, samples of virus were taken from the intestines people infected four months earlier. Stanford University has shown that some patients “continued to shed viral RNA in their stool seven months after an initial mild or moderate SARS-CoV-2 infection, well after their respiratory symptoms had subsided”.

Hence the theory of viral reservoirs which would allow these “ghosts” of the Covid to persist over time. A theory that requires verification.