Result for
Topic: Transmission
January 8, 2021
Rates of COVID-19 Among Residents and Staff Members in Nursing Homes — United States, May 25–November 22, 2020
Rates of COVID-19 among nursing home residents and staff members increased during June and July 2020, reaching 11.5 cases per 1,000 resident-weeks in late July. After declines in August and September, rates increased again, reaching 23.2 cases per 1,000 resident-weeks in the week of November 22. Trends in reported COVID-19 cases among nursing home residents…
Participation in Fraternity and Sorority Activities and the Spread of COVID-19 Among Residential University Communities — Arkansas, August 21–September 5, 2020
Transmission of SARS-CoV-2 increased rapidly at an Arkansas university within two weeks of the start of the 2020-2021 academic year, likely facilitated by on- and off-campus congregate living settings and activities. Just 5% of the 965 people with confirmed SARS-CoV-2 at the university attended classes in person, and less than 1% of the positive cases…
January 7, 2021
Open Schools, Covid-19, and Child and Teacher Morbidity in Sweden
Incidence of severe COVID-19 was low among school-aged children in Sweden from March to June 2020, despite keeping schools open and the absence of face mask policies. A total of 15 children (0.77 per 100,000) were admitted to the ICU, four of whom had an underlying condition. All children survived. Risk of severe COVID-19 among…
January 6, 2021
Genomic Evidence of In-Flight Transmission of SARS-CoV-2 Despite Predeparture Testing
Genomic analysis of viral SARS-CoV-2 isolates obtained during a mandatory quarantine period after a Dubai-to-New Zealand flight demonstrate clear evidence of in-flight transmission. Among 86 passengers on a flight that arrived on September 29, 7 individuals in managed isolation and quarantine (MIQ) had positive test results during the quarantine period. Passengers originated from 5 different…
January 5, 2021
Rapid Transmission of Severe Acute Respiratory Syndrome Coronavirus 2 in Detention Facility, Louisiana, USA, May–June, 2020
A cohort investigation in a detention facility in Louisiana identified rapid transmission and high cumulative incidence of SARS-CoV-2 infection among quarantined inmates. Among 143 persons in 6 quarantined dormitories tested using serial nasal swabs, 53 were PCR positive at initial testing and an additional 58 persons tested positive at later time points (cumulative incidence 78%)….
January 4, 2021
Implications of Shortened Quarantine Among Household Contacts of Index Patients with Confirmed SARS-CoV-2 Infection — Tennessee and Wisconsin, April–September 2020
Among asymptomatic people who had household exposure to COVID-19 and had negative laboratory test results for 7 days after the index patient’s symptom onset, 19% experienced symptoms or received positive test results in the following week. The probability that an asymptomatic household contact with negative test results through day 7 would remain asymptomatic and test…
December 28, 2020
“There’s No Place Like Home for The Holidays:” Travel and SARS-CoV-2 Test Positivity Following Thanksgiving Weekend
[pre-print; not peer-reviewed] An online panel survey administered December 4-18, 2020 to individuals from 10 US states (n = 7,905) found that many individuals reported spending Thanksgiving outside of their home (26%) or at home with at least one non-household member (27%). Planned travel over the December holidays was more common among those who tested…
Assessment of Air Contamination by SARS-CoV-2 in Hospital Settings
In a systematic review of 24 studies evaluating the level of air contamination from SARS-CoV-2 in different hospital areas and factors associated with contamination, 17% of air samples from close patient environments were positive for SARS-CoV-2 RNA, with viability of the virus found in 9% of cultures. There was no significant difference in positivity between…
December 21, 2020
No Evidence of Association between Schools and SARS-CoV-2 Second Wave in Italy
[Pre-print, not peer-reviewed] There was no evidence from a prospective study that school reopenings across Italy drove the second wave of SARS-CoV-2 infections. Analysis of data from 20 regions indicated that from September 12 to November 7, new SARS-CoV-2 cases among elementary and middle school students was an average of 39% lower than in the…
Transmission of SARS-CoV-2 before and after Symptom Onset Impact of Nonpharmaceutical Interventions in China
[Pre-print, not peer-reviewed] Using serial interval data from infector-infectee pairs before and after the rollout of non-pharmaceutical interventions (NPIs) in China (January and February 2020), the relative frequency of pre-symptomatic transmission increased from 34% pre-rollout to 71% post-rollout. After the rollout of NPIs, transmission post-symptom onset was reduced by 82% whereas pre-symptomatic transmission decreased by…
Previous page Next page