Editor's Note The Centers for Disease Control and Prevention (CDC) on June 10 announced that it will no longer require international travelers to have a negative COVID-19 test before flying to the US, effective June 12. The CDC continues to recommend that travelers flying to the US get tested as…

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Editor's Note This Israeli study finds that individuals previously infected with COVID-19, regardless of whether they had been vaccinated, had more protection against reinfection than those who were vaccinated (Pfizer-BioNTech vaccine) but previously uninfected. Among the findings for the number of COVID-19 cases per 100,000 person days since vaccination or…

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Editor's Note This study, led by researchers at IQVIA, Durham, North Carolina, finds that in a young, healthy, highly vaccinated cohort of players and staff in the National Basketball Association (NBA), booster vaccinations were associated with a significant reduction in COVID-19 infections during the Omicron wave. Of 2,613 players and…

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Editor's Note This Norwegian study finds that maternal COVID-19 vaccination during the second or third trimester of pregnancy was associated with a reduced risk of COVID-19 within the first 4 months of life of their infants. Of 21,643 infants analyzed, 9,739 (45%) were born to women who received a second…

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Editor's Note Based on this update of a systematic review and meta-analysis of 130 studies, led by researchers from the University of Bern, Switzerland, most COVID-19 infections were not persistently asymptomatic, and asymptomatic infections were less infectious than symptomatic infections. Because of variability among studies, the meta-analysis did not calculate…

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Editor's Note This South Korean study finds that fully vaccinated individuals have a shorter duration of viable viral shedding and a lower rate of secondary transmission than partially vaccinated or unvaccinated individuals. This study uses 2 cohorts to separately determine the transmissibility of COVID-19 according to vaccination status (ie, fully…

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Editor's Note This study led by researchers from the University of Pennsylvania, Philadelphia, finds that from the second (November 2020 to February 2021) through the third periods (July to October 2021) of the COVID-19 pandemic, declines in mortality for various racial, ethnic, and gender combinations were especially large for those…

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Editor's Note In a May 18 position statement, ECRI recommends that it’s time to move to a regularly scheduled COVID-19 vaccine booster model. “Moving to a regular vaccine schedule will increase clarity and confidence about what actions to take and when, compared to the current piecemeal, wait-and-see approach,” says Marcus…

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Editor's Note This study from the University of Chicago finds that unvaccinated adults with prior COVID-19 infection had an 85% lower risk of acquiring COVID-19 again than unvaccinated adults without prior COVID-19. The researchers analyzed data from patients tested for COVID-19 at 1,300 sites of care in 6 western states…

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Editor's Note This study from the UK finds that two doses of the Pfizer-BioNTech vaccine were associated with high short-term protection, but this protection waned considerably after 6 months; whereas, infection-acquired immunity boosted with vaccination remained high more than 1 year after COVID-19 infection. Of 35,768 participants analyzed, 9,488 (27%)…

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