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Coronavirus: traces spotted on a scanner dating from November in Colmar

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In Colmar, traces of coronavirus detected on a scanner dating from mid-November (photo of illustration)

CORONAVIRUS – When and how did the Covid-19 enter France? In the Haut-Rhin, at the Albert-Schweitzer Hospital in Colmar, medical imaging files are combed through in order to locate traces of coronavirus dating from before the epidemic on the scanners, reports The Parisian, this Monday, May 18.

In this hospital, 2,456 scanners carried out between October 15 and April 30 are studied. Others dating from October 1 to 14 will also be the subject of research. For Dr. Michel Schmitt, interviewed by The Parisian, the goal is to research “typical lung abnormalities caused by Covid-19” to better understand when, how and how quickly the disease spread. Initial results which will have to be confirmed.

Fourteen cases before January

And precisely, a scanner dating from November 16 shows these anomalies on a first case. A second case was found for the month of November, twelve in December and sixteen in January. According to the media, the next step is to meet, conduct epidemiological analyzes, to trace their history and discover how they may have been infected when the epidemic was not yet declared in the country.

However, for the President of the Chest Imaging Society, Antoine Khalil, “it will be difficult to have absolute proof of the infection at that time, unless nasal or blood samples have been kept. A serological test could confirm the presence of antibodies but not date their presence. ”

Also, some lesions may be visible without, however, being ceaselessly attributable to Covid-19. “We would like to say: we have an exam and it is 100% reliable. Unfortunately, it’s not that simple, explains to Parisian Chantal Raherison-Semjen, president of the pulmonology society. Frosted glass lesions (inflammations visible in Covid-19 shots) are encountered in many diseases. The scanner is a tool, but not the panacea ”.

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