Biology, 05.05.2020 16:17 volocibel

The virus that causes avian (bird) flu can attach to the cells of the lower part of the respiratory system in humans, but not to the cells of the upper part of the respiratory system. The most likely reason for this is that these two groups of cells have different .

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The virus that causes avian (bird) flu can attach to the cells of the lower part of the respiratory...