Editor's Note In this study, researchers from Northwestern Memorial Hospital and Feinberg School of Medicine, Chicago, find that more healthcare workers (HCWs) were exposed to COVID-19 by coworkers than patients, and lapses in infection prevention practices increased transmission risk. Between June and December 2020, 2,357 HCWs were involved in occupational…

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Editor's Note This study by researchers at the Centers for Disease Control and Prevention finds that adverse reactions after the third dose of Pfizer-BioNTech’s COVID-19 vaccine were similar to those after the second dose. Of 12,591 participants who completed a survey after all three doses: 79.4% and 74.1% reported local…

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Editor's Note This study by Israeli researchers finds that restrictions implemented during COVID-19 dramatically altered daily routines and limited time spent outdoors, which resulted in deteriorating personal wellbeing. The analysis of 7,517 adults from 40 countries who were surveyed during the 2020 COVID-19 restrictions found that social restrictions impaired all…

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Editor's Note In this study, Centers for Disease Control and Prevention (CDC) researchers report on the comparative effectiveness of COVID-19 vaccines against hospitalization of US adults without immunocompromised conditions. Included in the case-control analysis were 3,689 adults aged 18 years and older who were hospitalized at 21 US hospitals between…

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Editor's Note A total of 95.19% of US counties are reporting high COVID-19 transmission rates, with at least 100 new cases per 100,000 people in the past 7 days, according to the Centers for Disease Control and Prevention. The surge in COVID-19 cases is being driven largely by the Delta…

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Editor's Note A new study from the Centers for Disease Control and Prevention (CDC) finds that more than 83% of Americans had COVID-19 antibodies before the surge of the Delta variant began. Researchers examined data from 1,443,519 blood donation specimens obtained before the Delta variant. Overall infection-induced COVID-19 antibodies increased…

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Editor's Note In this study, Centers for Disease Control and Prevention (CDC) researches find that COVID-19 vaccine effectiveness in frontline workers diminished with the rise of the Delta variant. Effectiveness of the COVID-19 vaccines declined to 66% after the Delta variant became dominant, compared with 91% before its spread. The…

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Editor's Note This study by researchers with the Centers for Disease Control and Prevention (CDC) finds that from May 3 to July 25, 2021, there were 1,271 new COVID-19 hospitalizations among fully vaccinated adults in New York, compared with 7,308 among unvaccinated adults. Hospitalization rates declined through the week of…

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Editor's Note This study led by researchers at the Centers for Disease Control and Prevention (CDC) and Massachusetts Department of Public Health finds that people vaccinated against COVID-19 can carry as much coronavirus as those who are unvaccinated. After multiple large public events in a Barnstable County, Massachusetts town, 469…

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Editor's Note The Centers for Disease Control and Prevention (CDC) on July 27 released new guidance recommending that “fully vaccinated people wear masks in public indoor settings” in areas with high COVID-19 transmission rates. The CDC cited data showing that some vaccinated people who tested positive for the Delta variant…

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