Result for
Topic: Transmission
November 20, 2020
SARS-CoV-2 in Migrant Worker Dormitories: Geospatial Epidemiology Supporting Outbreak Management
Barracks-style buildings for migrant workers in Singapore were associated with a faster pace of infection when compared to apartment-style housing. After all workers were confined to their respective living quarters, the number of cases of SARS-CoV-2 infection doubled every 1.6 days in barracks-style buildings whereas the corresponding doubling time for apartment-style buildings was 2.7 days….
COVID-19 Outbreak Associated with a 10-Day Motorcycle Rally in a Neighboring State — Minnesota, August–September 2020
Following a 10-day motorcycle rally in Sturgis, South Dakota attended by approximately 460,000 persons, 51 confirmed cases of COVID-19 that were directly associated with the event were identified in Minnesota residents, along with 21 secondary cases and five tertiary cases. An additional nine likely event-associated secondary or tertiary cases were identified. Four patients were hospitalized,…
November 19, 2020
Secondary Attack Rate of COVID-19 in Household Contacts in the Winnipeg Health Region, Canada
Analysis using data from a public health surveillance database including residents of the Winnipeg Health Region of Canada estimated a household secondary attack rate of 14.7%. Out of 279 contacts from 102 primary cases in unique households, 41 contacts from 25 households became secondary cases within 14 days of exposure to the primary case. Wilkinson…
SARS-CoV-2 Epidemic after Social and Economic Reopening in Three US States Reveals Shifts in Age Structure and Clinical Characteristics
[Pre-print, not peer reviewed] Analysis of epidemic characteristics during and after lockdowns from Rhode Island, Massachusetts, and Pennsylvania – states that successfully reopened in May 2020 without subsequent summer waves – showed changes in age-dependent mixing patterns. Using several daily data streams and mobility data, population-average mixing rates dropped by >50% during lockdown. However, elderly…
Secondary Transmission of COVID-19 in Preschool and School Settings after Their Reopening in Northern Italy a Population-Based Study
[Pre-print, not peer reviewed] An outbreak investigation in a group of schools in Italy from September to October 2020 detected an overall attack rate of 3.9%; 10 student and 2 teacher primary cases infected 39 secondary cases among 994 students included in the investigation. The attack rate in secondary schools was 6.6%, with the largest…
SARS-CoV-2 Transmission between Mink (Neovison vison) and Humans, Denmark
Serologic and phylogenetic investigation of three mink farms in Denmark indicate rapid SARS-CoV-2 transmission among mink, as well as human-to-mink and mink-to-human transmission. Samples from 30 mink on 3 farms indicate that seroprevalence ranged from 66% to >95%, with one mink farm jumping from 3% to >95% within 8 days. Sequencing of SARS-CoV-2 samples from…
November 18, 2020
Secondary Attack Rate and Family Clustering of SARS-CoV-2 Infection in Children of Healthcare Workers with Confirmed COVID-19
Seropositivity against SARS-CoV-2 was found in 45% of children in households with a parent who is a healthcare worker and who had confirmed COVID-19. Secondary cases appeared to cluster in certain households, with 95% seropositivity among children in households with at least one secondary transmission. In a cohort study of 44 children from 21 households…
November 17, 2020
Continued Age Shift of Confirmed Positive COVID-19 Incidence Over Time to Children and Young Adults Washington State March – August 2020
[Pre-print, not peer reviewed] A longitudinal cohort analysis in Washington State found a shift in the age distribution of confirmed COVID-19 cases from older age groups to young adults and children. From March to April 2020, there was a 10% decline in cases age 60 years and older and a 20% increase among those age…
November 16, 2020
Pattern of SARS-CoV-2 Infection among Dependant Elderly Residents Living in Long-Term Care Facilities in Marseille, France, March–June 2020
Results from a SARS-CoV-2 PCR-based screening campaign found a high proportion of asymptomatic infection among residents and staff of long-term care facilities in France, with higher frequencies among residents than staff (13.4% versus 8.7%). Among infected residents, 16.4% were detected based on symptoms and 83.6% through mass screening. While many SARS-CoV-2 positive residents had respiratory…
November 13, 2020
Risk Assessment and Management of COVID-19 Among Travelers Arriving at Designated U.S. Airports, January 17–September 13, 2020
Symptom-based screening of travelers at US airports to prevent the spread of SARS-CoV-2 was found to be resource-intensive and ineffective. From mid-January to mid-September, a total of 766,044 travelers were screened, 298 (0.04%) of whom met criteria for public health assessment. 35 of those passengers (0.005%) were tested for SARS-CoV-2, and nine (0.001%) were positive….
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