The World Health Organization (WHO) has announced that the B.1.1.529 lineage of Sars-CoV-2, thought to have emerged in southern Africa, is to be designated as a variant of concern (VoC) named omicron. This decision has already precipitated a broad shift in priorities in pandemic management on a global scale.
The WHO has recommended, among other things, increased surveillance, particularly virus genome sequencing; focused research to understand the dangers posed by this variant; and ramping up mitigation measures, such as mandatory mask wearing. Greater restrictions on international travel have already come into force in the UK and many other countries. Indeed, Japan has closed its borders to all foreign visitors.
The speed with which the omicron variant was designated a VoC was dizzying. A little over two weeks passed since the first known infections in Botswana and South Africa. Contrast this with the delta variant that is currently dominant in Europe and many other parts of the...
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