WHO re-examines Italy’s blood samples in 2019, more research findings rewrite the timeline of COVID-19
WHO re-examined Italy’s blood samples in 2019. More research findings have rewritten the timeline of the new crown epidemic.
On the 9th local time, the National Cancer Institute of Milan, Italy issued a press release stating that they provided the WHO with Based on blood samples containing antibodies to the new coronavirus collected in 2019, the results may confirm their inference that the new coronavirus has spread in Italy in 2019.
The communiqué stated that the blood samples submitted for testing were collected between October and December 2019. The WHO designated a laboratory in the Netherlands to perform retesting. The test results and related interpretations still cannot determine the origin and nature of the new crown virus, but it can prove whether the virus has spread in Italy before the official announcement of the first confirmed case of local new crown pneumonia on February 21, 2020.
The study said that the new crown virus may have been concerned about spreading in September 2019
In December last year, another group at the University of Milan Researchers reported in the US “Journal of New Infectious Diseases” that a 4-year-old boy’s oropharyngeal swab sample collected on December 5, 2019 tested positive for the new coronavirus. The boy had no history of travel before that time.
In November last year, the US Centers for Disease Control and Prevention The personnel reported in the bimonthly issue of Clinical Infectious Diseases that they tested 7,389 blood samples collected by the American Red Cross between December 13, 2019 and January 17, 2020, and found that 106 blood samples contained Anti-coronavirus antibodies.
Not only have clues to earlier new coronavirus infections found in humans, research on wastewater also shows that the new coronavirus may already exist.
The University of Barcelona, Spain issued a communiqué in June last year. , A research team at the school found that a wastewater sample collected on March 12, 2019 tested positive for the new coronavirus nucleic acid, but the virus level was very low. This means that the new crown virus may have existed in Barcelona at that time, which is much earlier than the time when the first confirmed case of new crown was reported in the world.
Federal University of Santa Catarina, Brazil last year A research report published in July stated that the research team detected the genetic material of the new coronavirus in a wastewater sample collected in Florianópolis on November 27, 2019. This is about 3 months ahead of the time when Brazil reported the first new crown case.
It was published last June by the Italian Institute of Advanced Health The communiqué stated that the researchers detected the genetic material of the new coronavirus in the wastewater from the cities of Milan and Turin that were sampled on December 18, 2019.