Omicron might not be the last variant, but the last worrying variant – archyde

Cambridge: It is debatable whether viruses are alive, but like all living things, they keep evolving. This fact became abundantly clear during the pandemic as new varieties of concern emerged every few months.

Some of these variants were able to spread better from person to person and eventually became dominant as they crowd out slower versions of SARS-CoV-2, the virus that causes COVID-19.

This improved ability to spread has been attributed to mutations in the spike protein, the mushroom-shaped protrusions on the surface of the virus that allow it to bind more strongly to ACE2 receptors. ACE2 are receptors on the surface of our cells, as they line our airways, that the virus attaches to in order to gain entry and start replicating.

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