Last year, the WHO began to use Greek letters to name new strains of the new coronavirus that have raised concerns. They started with the Greek letter Alpha and changed rapidly over the following months. In less than a year, Omicron, which opened in November, is the 13th variant to be named. But it’s been 10 months since Omicron’s first appearance, and the next Alphabet Pie hasn’t been launched. This does not mean that the evolution of SARS-CoV-2 has stopped. But it may have entered a new phase. All of the most important mutations of the new coronavirus currently come from Omicron . The newest subtype variant, BA.2.75.2, is better at evading immune responses than all previous Omicron variants. BA.2.75.2 is still extremely rare, accounting for only 0.05% of the new coronaviruses sequenced globally in the past three months.
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