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Tag: non-pharm interventions
March 29, 2021
Stochastic Sampling Effects Favor Manual over Digital Contact Tracing
A study using a stochastic model to compare manual and digital contact tracing methods found that even if the probability of tracing a contact was equal by each method, manual tracing robustly performed better than digital, after accounting for intrinsic delays and limited scalability associated with manual measures. The authors note that better performance of…
Evaluating the Effects of Shelter-in-Place Policies during the COVID-19 Pandemic
A study of shelter-in-place (SIP) policies during the first wave of the COVID-19 pandemic (February 24 – May 30, 2020) in the US did not find the SIP policies impacted disease spread or deaths, but did impact mobility and unemployment. The authors note that SIP policies may not have made meaningfully impacts on behaviors beyond…
March 25, 2021
In-Person Schooling and COVID-19 Transmission in Canada’s Three Largest Cities
[Pre-print, not peer-reviewed] Mandatory in-person instruction without universal mask mandates may contribute to increased community transmission of SARS-CoV-2, according to a comparative case study that examined weekly incidence among children ages 0-19 years in Canada’s three largest cities from August 2020 to January 2021. The highest incidence among children ages 0-19 years by the end…
March 23, 2021
Details of COVID-19 Disease Mitigation Strategies in 17 K-12 Schools in Wood County Wisconsin
[Pre-print, not peer-reviewed] Minimal in-school transmission of COVID-19 occurred despite low adherence to mitigation measures and minimal improvements in ventilation systems between August and November 2020 in Wood County, Wisconsin. According to surveys distributed to the administrations of participating schools, 89% of elementary students did not maintain 6 feet of physical distancing in the classroom,…
March 17, 2021
An Integrated Analysis of Contact Tracing and Genomics to Assess the Efficacy of Travel Restrictions on SARS-CoV-2 Introduction and Transmission in England from June to September 2020
[Pre-print, not peer-reviewed] A study of the genomic epidemiology of travel-associated SARS-CoV-2 determined that 51% of imported cases in England were related to travel to one of three countries: Greece (21%), Croatia (16%), and Spain (14%). 4,207 cases were of travel-associated SARS-CoV-2 were identified by contact tracing and defined as those that had travelled within…
March 16, 2021
Social Distancing Compliance: A Video Observational Analysis
Closed Circuit Television (CCTV) footage in inner-city Amsterdam, Netherlands showed short-lived adherence to physical distancing measures following implementation of “lockdown” policies. From February to May 2020, the observed number of physical distancing violations (less than 1.5 meters) decreased following announcements of physical distancing measures and full lockdown on March 23rd, but then increased onwards from…
Early Public Adherence with and Support for Stay-at-Home COVID-19 Mitigation Strategies despite Adverse Life Impact: A Transnational Cross-Sectional Survey Study in the United States and Australia
Self-reported adherence to COVID-19 mitigation policies was high in both highly- and minimally-affected regions in the US around the time of the first wave in April 2020, according to representative cross-sectional surveys (n=5,573) administered to adults residing in throughout the US, in New York City and Los Angeles, and Australia. 82% reported adherence to recommended…
March 15, 2021
Day Camp in the Time of COVID-19: What Went Right?
[Pre-print, not peer-reviewed] A survey of summer day camp directors (n = 23) in the metropolitan New York area conducted in September 2020 regarding their camps’ COVID-19 policies during the summer of 2020 found that common infection prevention policies included COVID-19 screening at entry, placing camp attendees in cohorts, maximizing outdoor activities, mandating mask use…
March 12, 2021
Assessment of Use and Fit of Face Masks Among Individuals in Public During the COVID-19 Pandemic in China
Sealing facemasks with adhesive tape strips improved the proportion of masks that had an airtight fit among mask users (n=6,003), based on a study conducted in Beijing, Yunnan, Shanxi and Jiangsu provinces (China). Participants were convenience sampled at public locations and administered a qualitative fit test to ensure proper fit and airtightness. The first qualitative…
March 11, 2021
COVID-19 Case Investigation and Contact Tracing in Central Washington State, June–July 2020
68% of individuals contacted by public health departments reported having “no close contacts” (with anyone), according to an evaluation of case investigations and contact tracing (CICT) in 3 health districts in central Washington State. The study included the results of interviews with individuals with COVID-19 (n = 3,572). A total of 968 individuals with COVID-19…
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