Demographics

UK posts initial COVID-19 BA.2.86 risk assessment Officials say the rapid appearance in multiple countries in people without travel histories suggests established international spread. CIDRAP

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The newly identified variant has many genetic mutations and is distant from BA.2, its likely ancestor, and currently circulating XBB variants. The similarity of the sequences so far—six samples from four countries—suggests relatively recent emergence and rapid growth, but the HSA said it has low confidence in that assessment, pending the examination of further sequences.

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Bivalent COVID vaccine boosts protection against emergency, urgent care in young kids Quinn Dombrowski / Flickr cc CIDRAP

A dose of bivalent (two-strain) mRNA COVID-19 vaccine booster pushed effectiveness against emergency or urgent care (ED/UC) to 80% among preschool children, compared with 46% after two Moderna monovalent (single-strain) doses and 70% after three monovalent Pfizer/BioNTech doses.

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Older discharged COVID patients at twice the risk of death as older flu patients, study finds US Navy, Ryan M. Breeden / Flickr cc CIDRAP

Older adults who are hospitalized for COVID-19 have double the rate of death upon discharge as older adults hospitalized for influenza-related complications, according to a new study in The BMJ.

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