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柳葉刀上的研究報告! 歐洲2019年暑假就有疫情, 你媽屄!! 11月比暑假還早?? Summer 2019: Surveillance in Lombardy
Italian researchers conducted measles and rubella surveillance in Lombardy, focusing on skin manifestations and measles-like symptomology.
They took 435 samples from 156 people and analyzed them for the presence of SARS-CoV-2.
They found genetic material belonging to the virus in 13 samples, 11 of which were from the pre-pandemic period. However, they found no clear evidence of infection in 281 samples collected between August 2018 and July 2019, ruling out much earlier circulation.
The first case they detected dated back to September 12, 2019, which spurred them to believe that infections emerged between late June and August 2019.
The preprint study appears in the journal The Lancet.