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Background: During Late 2022, the SARS-CoV-2 Omicron BA.5 sublineages accounted for most of the sequenced viral genomes worldwide. Bivalent mRNA vaccines contain an ancestral SARS-CoV-2 strain component plus an updated component of the Omicron BA.4/BA.5. Since September 2022, a single bivalent booster dose has been recommended for adults who have completed a primary vaccination series and are at high risk for severe Covid-19 disease. Evidence regarding the effectiveness of the bivalent vaccine in reducing hospitalizations and death due to Covid-19 is warranted.Methods: This retrospective cohort study included all members of Clalit Health Services, aged ≥65, eligible for a bivalent booster....

Jack Bauer Doesn't Jump - More's the Pity Previously on "24' the show made sense. But Monday night's finale, when we sat through 90 minutes of set-up, waiting for the usual slam bang finish, only to have a touchy-feely episode of "Grey's Anatomy'' break out, was the end. The big finish, with Jack Bauer standing on coast, looking moodily out to sea, was some kind of weird Hallmark card for secret agents. I kept waiting for the cliff to blow up, or a black helicopter to appear on the horizon, but no, it was just our Jack, alone with his...