Article Summary
October 29, 2020
Optimal COVID-19 Quarantine and Testing Strategies
[Pre-print, not peer reviewed] A mathematical model found that a 13-day quarantine with testing on entry, a 9-day quarantine with testing on exit, and an 8-day quarantine with testing on entry and exit all provide equivalent or lower probability of post-quarantine transmission compared to a 14-day quarantine with no testing. When limited to a single…
COVID-19 Outbreak at an Overnight Summer School Retreat ― Wisconsin, July–August 2020
Investigation of a SARS-CoV-2 outbreak associated with an overnight high-school retreat suggests a single introduction from a student subsequently infected 76% (116) of attendees. The suspected index case received a negative PCR result 1 week prior to the retreat but experienced symptoms shortly after arrival. The attack rate among susceptible attendees was 91% (116 of…
Evaluating the Effect of Demographic Factors, Socioeconomic Factors, and Risk Aversion on Mobility during the COVID-19 Epidemic in France under Lockdown: A Population-Based Study
Analysis of mobile phone data in France showed that the March lockdown was effective in reducing population mobility, reducing countrywide displacements from 57 to approximately 20 million trips per day (65% reduction). Mobility drops were strongly associated with regions with active populations, workers employed in sectors highly affected by the lockdown, and hospitalizations. However, anomalous…
October 28, 2020
Effects of New York’s Executive Order on Face Mask Use on COVID-19 Infections and Mortality A Modeling Study
[Pre-print, not peer reviewed] According to estimates from a modeling study, the Executive Order issued by New York State mandating mask use reduced the number of COVID-19 infections by 99,517 (95% CIs: 72,723-126,312) and COVID-related deaths by 7,978 (5,692-10,265). If the Executive Order were implemented earlier, greater numbers of infections and deaths would have been…
Reducing Covid-19 Risk in Schools a Qualitative Examination of Staff and Family Views and Concerns
[Pre-print, not peer reviewed] Qualitative interviews following school re-opening in the UK demonstrated that both families and staff were generally supportive of COVID-19 mitigation efforts. A qualitative interview with 13 school staff, 20 parents and 17 young people revealed that participants saw the anticipated COVID-19 mitigation plans implemented prior to school re-opening as acceptable and…
A Large-Scale Survey on Trauma, Burnout, and Posttraumatic Growth among Nurses during the COVID-19 Pandemic
Nurses in China reported low levels of post-traumatic stress and moderate levels of post-traumatic growth when surveyed in April. An online cross-sectional survey of 12,596 nurses in China (52% worked in COVID-19 designated hospitals) reported that 13% reported trauma whereas 39% experienced post-traumatic growth. Nurses who identified as women, worked in ICUs, COVID-19 designated hospitals,…
Residential Context and COVID-19 Mortality among Adults Aged 70 Years and Older in Stockholm: A Population-Based, Observational Study Using Individual-Level Data
Household and neighborhood characteristics associated with COVID-19 mortality among older people (aged ≥70 years) included close exposure to working-age household members, living in a care home, and living in dense neighborhoods. In a population-based cohort of older adults in Stockholm county in Sweden (n= 274,712), close exposure to working-age household members (<66 years) (aHR=1.6), living…
Shorter Incubation Period Is Associated with Severe Disease Progression in Patients with COVID-19
Shorter time between exposure and the development of symptoms was associated with more frequent detection of COVID-19 associated pneumonia. A study of 330 patients hospitalized with laboratory-confirmed COVID-19 in January and February reported that patients with a shorter incubation period (defined as <3 days between the time of exposure and the onset of symptoms) were…
High Seroprevalence but Short-Lived Immune Response to SARS-CoV-2 Infection in Paris
[Pre-print, not peer reviewed] In a cohort of workers outside Paris, both the concentration (titer) and quality of antibodies against SARS-CoV-2 declined 4-8 weeks after sampling. Among a cohort of 1,847 active workers in the Paris conurbation in France, 11% were positive for IgG against SARS-CoV-2-specific protein and 9.5% had evidence of viral neutralization. After…
Declining Prevalence of Antibody Positivity to SARS-CoV-2 a Community Study of 365000 Adults
[Pre-print, not peer reviewed] Results from 3 non-overlapping cohorts in the UK demonstrated that the overall prevalence of detectable IgG antibodies against SARS-CoV-2 declined by 27% (from 6.0% to 4.4%) between late June and September 2020. Greater levels of decline were seen among older people aged 75+ years (-39%) compared to those 18-24 years old…
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