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Tag: transmission
October 16, 2020
COVID-19 Transmission in US Child Care Programs
In a study of COVID-19 outcomes among child care providers who provided in-person child care during the first three months of the pandemic versus those who did not, no association was found between exposure to child care and testing positive for or being hospitalized with COVID-19 in both unmatched (OR =1.06) and matched (OR=0.94) analyses….
SARS-CoV-2 Infections in Italian Schools Preliminary Findings after One Month of School Opening during the Second Wave of the Pandemic
[Pre-print, not peer reviewed] Preliminary data from a study of SARS-CoV-2 transmission in Italian schools showed that transmission appears to be low among younger students. As of October 5, a total of 1,350 SARS-CoV-2 infections had been registered in Italian territory schools in an online database of media news about infections in schools. Schools reported…
Transmission of SARS-CoV-2 from Children and Adolescents
[Pre-print, not peer reviewed] Children and adolescents who acquired SARS-CoV-2 infection during an overnight camp in June transmitted the virus to both pediatric and adult contacts in their households, with 10% of the adult secondary cases requiring hospitalization, based on a retrospective cohort study from Georgia. Among 526 tested household contacts of 224 infected individuals,…
October 15, 2020
An Outbreak of COVID-19 Associated with a Recreational Hockey Game
A SARS-CoV-2 outbreak was identified in an indoor hockey game in Tampa, Florida in June. The index case experienced symptoms one day after the game; 2 days later he received a positive antigen test. Overall, 62% (13 of 21) players experienced illness 2-5 days after the game (8 teammates, 5 members of the other team),…
October 14, 2020
Understanding the Los Angeles County Coronavirus Epidemic The Critical Role of Intrahousehold Transmission
[Preprint, not peer-reviewed] Household structure may play a role in the persistent propagation of COVID-19 epidemic, as suggested by a modeling study describing three phases of the COVID-19 epidemic in Los Angeles County. The model showed that during phase I (March 1-April 4), initial seeding of infection in relatively affluent areas was followed by radial…
The Duration of Infectiousness of Individuals Infected with SARS-CoV-2
The detection of SARS-CoV-2 via culture among patients with COVID-19 illness was highly unlikely beyond 10 days of symptom onset in patients with mild-to-moderate disease. In a systematic review of 15 studies with more than 800 patients (5 studies did not specify sample size), the authors estimate that only six out of 217 patients had…
SARS-CoV-2 Sequencing Reveals Rapid Transmission from College Student Clusters Resulting in Morbidity and Deaths in Vulnerable Populations
[Preprint, not peer-reviewed] In September 2020, La Crosse County, Wisconsin experienced a substantial COVID-19 outbreak (2,002 cases), which coincided with the return to in-person instruction at three local higher education institutions. Genomic sequencing identified rapid expansion of two SARS-CoV-2 sub-strains during this period, corresponding to two independent transmission events from college-aged individuals to older individuals…
October 13, 2020
The Household Secondary Attack Rate of SARS-CoV-2: A Rapid Review
A literature review of 22 household transmission studies comprising 20,291 SARS-CoV-2 household contacts from 10 countries found an overall pooled estimate of household secondary attack proportion of 17% (95%CI: 14-21%). Stratifying the studies by testing frequency showed the pooled secondary attack proportion estimates to be 9% with one test, 18% with two tests, and 21%…
SARS-CoV-2 Cluster in Nursery, Poland. Emerging Infectious Diseases
A SARS-CoV-2 outbreak was identified in a nursery in Poland in late May. The index case was a nursery worker who reported family contact with a symptomatic SARS-CoV-2-infected person, resulting in a cluster of 29 cases and positivity among 27% of contacts (compared to national estimates of 1%). Twelve of those infected were children’s family…
enomic Evidence for Reinfection with SARS-CoV-2: A Case Study. The Lancet Infectious Diseases
A man in Nevada was found to be the first case of SARS-CoV-2 reinfection in North America, testing positive first in April, then receiving two negative tests during follow-up in May, then testing positive again in June. Genomic analysis of the positive samples show significant genetic differences between viral strains collected during the two periods…
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