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Novel coronavirus circulated undetected months before first Covid-19 cases
- a0-prw 6y agoAnd yet some blood samples from the red cross blood donor program in the US, from as early as December 13, tested positive for exposure to Coronavirus. https://www.npr.org/sections/coronavirus-live-updates/2020/12/01/940395651/coronavirus-was-in-u-s-weeks-earlier-than-previously-known-study-says?t=1616601179159 https://www.npr.org/sections/coronavirus-live-updates/2020/1...