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866 (mean value), which is very close to the officially reported number. The methodology and main conclusions shown in this paper are of general interest, and they can be applied to other countries to help understand the local transmission of COVID-19 as well.Insights into how viruses change over time can help us cope with this pandemic and avoid future ones, says Jonathan R. Goodman.Watching birds is great entertainment, and there's fascinating physics behind how some get their colours, says Chanda Prescod-Weinstein.Good ventilation is
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