There are several key key unknown issues related to coronavirus. For example, how many asymptomatic cases have already occurred worldwide? How long do antibodies last?
And finally when the hell did the virus spread all over the world?
This is a question that we finally can have a better answer to today. According to a recent study, in the latest example of scientists who discovered evidence of the virus a few weeks or months earlier than previously known, Covid-19 was discovered in sewage in Milan and Turin back in December. This was two months before the first cases were officially discovered in Italy, according to Bloomberg,
Giuseppina La Rosa, who leads the upcoming study by the Italian National Institute of Health, said: “SARS-Cov-2 traces were found in wastewater samples taken in Milan and Turin on December 18 and in Bologna on January 29. More traces were found in other test samples during January and February. ”
From October 2019 to February 2020, 40 samples were tested in the country as part of regular wastewater tests.
Hospital tests in other parts of Italy, such as the coastal region of Liguria, also show that the virus was present late last year. Italy’s earliest “official” case was related to the person who sought treatment in mid-February.
La Rosa says the study “may help shed light on the first phase of the spread of the virus in Italy.”
Amazingly, similar results were found in wastewater in Barcelona, where traces of the virus were also detected at the end of 2019.
In the same time, China claims that only 83,325 official cases of coronavirus were recorded in the country, and only 4,634 died.