The first time a multi-country new crown outbreak occurred at a point in time or significantly earlier

, the shadow of the new coronavirus is not dissipated, but is spreading at an accelerated pace around the world. As the global study of the new crown pneumonia outbreak continues to deepen, the timeline of outbreak development in many countries has been rewritten, the time point at which confirmed cases or outbreaks spread locally or have been significantly advanced.team led by the University of Barcelona in Spain detected the new coronavirus in a sample of Barcelona wastewater collected in March last year, the University of Barcelona announced on June 26.
team's researchers had detected the presence of the new coronavirus in wastewater samples on January 15 this year. The first confirmed case of the crown was not reported in mainland Spain until 25 February this year.Melham, the mayor of Belleville, Essex, New Jersey, has said he tested positive for the new coronavirus antibody and believes he contracted it last November.
first newly crowned confirmed case was reported in the United States in January. New Jersey reported its first confirmed case of a new crown on March 4. U.S. public health experts believe the new coronavirus may have quietly spread in the U.S. in the first two months of this year, but at the time the detection was small and the testing conditions were harsh.A study published July 2 by the Federal University of Santa Catarina in Brazil says a team led by the university detected the new coronavirus in wastewater samples collected on November 27 last year in Florianopolis, the capital of Santa Catarina state.researchers tested ICTs for the new coronavirus in wastewater samples from two northern Italian cities, Milan and Turin, in December, according to a study published June 18 by Italy's Institute of Advanced Health., head of the intensive care unit at two hospitals affiliated with the Paris Public Hospitals Group, told French media on May 3rd that there had been new cases of coronavirus infection in France at least by the end of December. That's nearly a month before the first confirmed cases announced by French officials.analysis suggests that the new coronavirus may have spread widely around the world by the end of last year, according to a study published in the journal Infection, Genetics and Evolution by researchers at University College London.
the team analyzed genomic data from more than 7,500 new coronavirus infections around the world and concluded that the same ancestor of these new coronavirus came from the end of 2019, which could be the time when the new coronavirus jumped from nature to human host.