Sequencing is only done on a very small fraction of positives samples. For Omicron, one of the three rt-pcr reactions that worked for Wuhan/Delta doest work, so a lot of places should be able to distinguish without sequencing. (If I understand everything correctly.) Whether or not that info can be used by the physicians will probably depend on how the lab publishes the results. There's obviously a great deal of clinical relevance.
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