According to CCTV news, researchers in Spain, Brazil and Italy detected the new SARS-CoV-2 in waste water samples from March, November and December last year.Some experts said that the new SARS-CoV-2 may have been "sleeping" in many places around the world before the outbreak in Asia.Many cases may be covered up because they were misdiagnosed as influenza.Studies have shown that the genetic material of the SARS-CoV-2 may enter the waste water through the feces of infected persons.

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Virologist Fungaro of the Federal University of Santa Catarina, Brazil, replied that in the sewer sewage samples on November 27 last year, the presence of the new SARS-CoV-2 was detected for the first time.In the sewage samples in February and March this year, the presence of SARS-CoV-2 was also detected.

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To further prove that SARS-CoV-2 existed as early as last year, the research team was looking for patients who reported having similarities to SARS-CoV-2 last year and tried to recruit them as volunteers.The research team said that after acquiring live virus samples from these acute respiratory patients during their illness, they will be tested for the nucleic acid of SARS-CoV-2.In response to this research, geneticist Stoco of the Federal University of Santa Catarina, Brazil said: If the sequencing results prove that the virus is the same as SARS-CoV-2, then we can confirm that SARS-CoV-2 in clinical cases of new pneumonia and sewage Earlier than official records.The virus has already spread very early.

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Spain and Italy have successively detected SARS-CoV-2 in waste water samples last year.The research of waste water samples in many countries is constantly rewriting the timeline of the occurrence of SARS-CoV-2 in various places, and it has also caused experts to think about the origin and spread of SARS-CoV-2.

(Source: CCTV News)