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Tag: transmission
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
Prolonged Shedding of Severe Acute Respiratory Syndrome Coronavirus 2 in Patients with COVID-19. Emerging Microbes & Infections
In a cohort of “long-term” COVID-19 patients who recovered from acute disease but still shed viral RNA for more than 3 months (n=38), the median shedding duration was 92 days. Fluctuations between positive and negative PCR tests were observed and viral loads were lower than in patients with acute infection. Most participants were elderly people…
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….
COVID-19 Outbreak in an Amish Community — Ohio, May 2020
Social gatherings likely contributed to the rapid transmission of SARS-CoV-2 throughout an Amish community in rural Ohio. Access to testing was increased after an initial cluster of seven SARS-CoV-2 cases was identified in May, resulting in 77% positivity among the 30 additional residents tested by RT-PCR. Transmission was associated with multiple social gatherings, including church…
November 12, 2020
Multiple COVID-19 Outbreaks Linked to a Wedding Reception in Rural Maine — August 7–September 14, 2020
An outbreak investigation of a wedding reception in rural Maine attended by 55 people in August 2020 initially identified 30 primary COVID-19 cases, but infected wedding guests were later identified as the likely source of outbreaks in the local community, a long-term care facility 100 miles away, and a correctional facility 200 miles away. Overall,…
Long-Distance Airborne Dispersal of SARS-CoV-2 in COVID-19 Wards
Detection of SARS-CoV-2 in the ventilation system of 3 linked COVID-19 wards in a Swedish hospital suggests long-distance airborne dispersal beyond droplet transmission. SARS-CoV-2 genetic material was detected in 7 of 19 vent openings within wards, while 8 of 9 samples obtained from HEPA exhaust filters located several floors above the wards were also positive…
ARS-CoV-2 Transmission among Marine Recruits during Quarantine
Among a cohort of US Marine Corps recruits who were tested on days 1-2, 7, and 14 after arrival to campus (n=1848), 16 (0.9%) tested positive for SARS-CoV-2 by day 2, followed by 35 more (1.9%) by day 14. Genomic analysis from 32 positive recruits identified 6 clusters among 18 recruits, providing evidence for local…
An Outbreak of Covid-19 on an Aircraft Carrier
In an outbreak on an aircraft carrier in late March 2020, 1271 (26.6%) of 4779 crew members had SARS-CoV-2 positive PCR results, and an additional 60 crew members had suspected COVID-19. In this predominantly young (mean age 27 years) population, 23 were hospitalized, 4 received intensive care, and 1 died. Nearly 80% were asymptomatic at…
November 10, 2020
The Role of Children in the Transmission Chain of SARS-CoV-2 a Systematic Review and Update of Current Evidence
[Pre-print, not peer reviewed] A systematic review and meta-analysis of 22 studies on the role of children in the SARS-CoV-2 transmission chain confirms that children are able to be infected and transmit SARS-CoV-2 in a variety of settings, with potentially different dynamics depending upon age. Transmission chains in which the index case was a child…
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