Where did COVID come from? WHO investigation begins but faces challenges.

@article{Mallapaty2020WhereDC,
  title={Where did COVID come from? WHO investigation begins but faces challenges.},
  author={Smriti Mallapaty},
  journal={Nature},
  year={2020}
}
  • S. Mallapaty
  • Published 1 November 2020
  • Medicine, Geography
  • Nature
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Sentinel surveillance of SARS-CoV-2 in wastewater anticipates the occurrence of COVID-19 cases
SARS-CoV-2 was detected in Barcelona sewage long before the declaration of the first COVID-19 case, indicating that the infection was present in the population before the first imported case was