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Coronavirus has been circulating in Italy since September 2019, study claims

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2021-8-5
发表于 2021-9-2 18:26 | 显示全部楼层 |阅读模式
With coronavirus cases around the world now at over 54 million, scientists have been working to understand exactly how and when the deadly bug started spreading.; q' ?# c. ]3 {4 {3 M& F$ Q# s" A
With coronavirus cases around the world now at over 54 million, scientists have been working to understand exactly how and when the deadly bug started spreading.
* \6 g. O6 N) ^  a$ \" B3 @Now, researchers claim that coronavirus may have been circulating in Italy as early as September 2019.2 w. {+ m+ J4 q1 ^( d
A team from the National Cancer Institute (INT) of the Italian city of Milan say the findings indicate that COVID-19 might have spread beyond China earlier than previously thought.
) {# n- U1 z" f5 E+ D  U7 hThe World Health Organization has said the new coronavirus and COVID-19, the respiratory disease it causes, were unknown before the outbreak was first reported in Wuhan, in central China, in December.
+ o" x. x+ O7 XItaly's first COVID-19 patient was detected on Feb. 21 in a little town near Milan, in the northern region of Lombardy.
% ^. p& E, R' |/ \  B( B% uBut the Italian researchers' findings, published by the INT's scientific magazine Tumori Journal, show that 11,6% of 959 healthy volunteers enrolled in a lung cancer screening trial between September 2019 and March 2020, had developed coronavirus antibodies well before February.
! z/ V# o7 P1 s, E0 n7 X- iA further specific SARS-CoV-2 antibodies test was carried out by the University of Siena for the same research titled "Unexpected detection of SARS-CoV-2 antibodies in the pre-pandemic period in Italy".
. h  T- N6 ~$ m* d- yIt showed that four cases dated back to the first week of October were also positive for antibodies neutralizing the virus, meaning they had got infected in September, Giovanni Apolone, a co-author of the study, told Reuters.
% M& {7 S! m0 p. l$ A( E1 |! x"This is the main finding: people with no symptoms not only were positive after the serological tests but had also antibodies able to kill the virus," Apolone said.& d$ O! W+ s) ]; m+ T  ~) W2 V2 c* e
"It means that the new coronavirus can circulate among the population for long and with a low rate of lethality not because it is disappearing but only to surge again," he added.8 p; ~& w9 [( A
Italian researchers told Reuters in March that they reported a higher than usual number of cases of severe pneumonia and flu in Lombardy in the last quarter of 2019 in a sign that the new coronavirus might have circulated earlier than previously thought.
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