The coronavirus was already present in two large cities in northern Italy in December, over two months before the first case was detected, a ...
On Feb 21 the government designated Codogno a so-called red zone and ordered it shuttered, followed by nine other towns across Lombardy and Veneto. By early March it had extended the shutdown across the country.ISS water quality expert Giuseppina La Rosa and her team examined 40 waste water samples from October 2019 to February 2020.
Samples from October and November 2019 were negative, showing the virus had yet to arrive, La Rosa said. It also pointed to a recent Spanish study that found genetic traces in waste water samples collected in mid-January in Barcelona, some 40 days before the first indigenous case was discovered. Researchers across the world have been tracing the spread of coronavirus through waste water and sewage, finding genetic traces from Brisbane to Paris and Amsterdam.
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