Article Summary
September 3, 2020
Temporal Profile and Determinants of Viral Shedding and of Viral Clearance Confirmation on Nasopharyngeal Swabs from SARS-CoV-2-Positive Subjects: A Population-Based Prospective Cohort Study in Reggio Emilia, Italy
Sixty percent (704/1162) of patients with confirmed COVID-19 did not have detectable SARS-CoV-2 RNA on a subsequent nasopharyngeal sample at a median time of 30 days (IQR 23-40) from diagnosis and 36 days (IQR (28-45) from symptom onset. However, 21% of participants with a negative sample had a subsequent positive sample, suggesting a high false…
Timing of State and Territorial COVID-19 Stay-at-Home Orders and Changes in Population Movement — United States
Based on location data from mobile devices, mandatory stay-at-home orders issued by states or territories were associated with decreased median population movement compared to the period before orders were implemented. The period after the first state relaxed a stay-at-home order was associated with increased population movement even in states or territories that still had a…
Rapid Real-Time Tracking of Non-Pharmaceutical Interventions and Their Association SARS-CoV-2 Positivity: The COVID-19 Pandemic Pulse Study
[Pre-print, not peer reviewed] Clipman et al. found strong dose-response relationships between frequency of movement (e.g. traveling for non-essential services) and self-reported SARS-CoV-2 positivity. Social distancing practices were associated with a lower likelihood of reporting a history of SARS-CoV-2 infection. Travel using public transport and visiting a place of worship were also associated with a…
September 2, 2020
“Immunity Passports” for SARS-CoV-2: An Online Experimental Study of the Impact of Antibody Test Terminology on Perceived Risk and Behaviour
In an online survey among 1,204 adults from a UK research panel, Waller et al. reported that by using the term “immunity” (vs “antibody”) to describe antibody tests for SARS-CoV-2, participants were more likely to perceive no risk of catching coronavirus given an positive antibody test result (OR 2.9). Perceiving no risk of infection was…
Analyzing Inherent Biases in SARS-CoV-2 PCR and Serological Epidemiologic Metrics
[Preprint, not peer reviewed] A modeling study found that the observed peak in PCR-detected SARS-CoV-2 infections can follow the peak of true infection incidence due to prolonged shedding of SARS-CoV-2 by approximately ten days in a scenario with an R0 of 1.6 versus 5 days when R0 is 3. Half of those who tested positive…
Potential Community and Campus Covid-19 Outcomes Under University and College Reopening Scenarios
[Preprint, not peer reviewed] A modeling study of various US college and university reopening plans (various fully open, hybrid, and fully virtual approaches) shows common reopening strategies could reduce student SARS-CoV-2 infections by 24%-26% and deaths by 36%-50%. Perfect testing and immediate quarantining of all students on arrival to campus at the start of term…
Modeling the Combined Effect of Digital Exposure Notification and Non-Pharmaceutical Interventions on the COVID-19 Epidemic in Washington State
[Preprint, not peer reviewed] A modeling study based on three counties in Washington state predicts that if 15% of the population participates a in digital exposure notification system, it could reduce SARS-CoV-2 infections by 8% and COVID-19 related deaths by 6%. The authors conclude that this approach could complement traditional contact tracing. Abueg et al….
Changes in Intimate Partner Violence during the Early Stages of the COVID-19 Pandemic in the USA
A survey with recruitment through social media and email invitation found that the level of self-reported intimate partner violence stayed the same throughout the beginning of the COVID-19 stay-at-home policies for the majority of participants (54%). Participants that did report changes in victimization were more likely to report that victimization became less severe during the…
COVID-19 Racism and Mental Health in Chinese American Families
Results from a survey of COVID-19 racism and racial discrimination among 543 Chinese American parents (78% mothers) and 230 of their children (48% girls) shows that nearly half of parents and youth reported being directly targeted by COVID-19 racial discrimination online (32% parents; 46% youths) or in person (51% parents; 50% youths), and most reported…
The Impact of COVID-19 on Student Experiences and Expectations: Evidence from a Survey. Journal of Public Economics
Among 1,500 undergraduates at Arizona State University, COVID-19 has led to negative effects on students’ current and expected outcomes: 13% have delayed graduation, 40% have lost a job, internship, or job offer, and 29% expect to earn less at age 35. These effects have been highly heterogeneous and followed existing socioeconomic divides. Lower-income students were…
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