This does not mean none is circulating or commuters can let down their guard, the researchers say.
from BBC News - Home https://ift.tt/2M9FAqA
from BBC News - Home https://ift.tt/2M9FAqA
No Covid variants found on London Tubes, buses and stations
![No Covid variants found on London Tubes, buses and stations]()
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February 18, 2021
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