Covid-19 Omicron BA.2: what does the “silent” omicron, the already dominant sub-variant around the world, look like?

  • Writing
  • BBC News World

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The BA.2 homicron

The extremely transmissible Omicron variant is being replaced worldwide by a sub-variant called BA.2, also referred to as “silent Omicron”.

Until mid-March, the most common variant on the planet was BA.1, which surprised experts with its level of transmissibility, even though it was less dangerous than the others.

But now the World Health Organization (WHO) has said the BA.2 subvariant accounts for nearly 86% of sequenced cases.

Infections, which were falling rapidly everywhere after the unimaginable daily spikes caused by Omicron, have risen again in Europe in recent weeks, and according to the head of the WHO’s European division, Hans Kluge, this is due to the line BA.2.

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