Result for
Topic: Transmission
June 5, 2020
The Natural History and Transmission Potential of Asymptomatic SARS-CoV-2 Infection
Among 30 quarantined people with RT-PCR-confirmed SARS-CoV-2 infection, nearly half (43%) were asymptomatic and asymptomatic individuals were less likely to test positive in follow-up tests than those with symptoms of COVID-19, indicating faster viral clearance. Chau et al. (June 4, 2020). The Natural History and Transmission Potential of Asymptomatic SARS-CoV-2 Infection. Clinical Infectious Diseases. https://doi.org/10.1093/cid/ciaa711
The Role of Children in the Dynamics of Intra Family Coronavirus 2019 Spread in Densely Populated Area
Among 13 family clusters in a city in Israel, after removing the index case, 58% of adults became SARS-CoV-2 positive by PCR compared to 33% of children 5-17 years and 12% of children less than 5 years of age. Children appeared to play a smaller role in transmission of SARS-CoV-2 than adults. Somekh et al. (June 1, 2020). The Role of Children in the…
Assessing Capacity to Social Distance and Neighborhood-Level Health Disparities during the COVID-19 Pandemic
[pre-print, not peer reviewed] A composite measure of neighborhood infection risk in New York City is associated with neighborhood social disadvantage and capacity to socially isolate (estimated by subway usage data), after adjusting for testing data. Carrion et al. (June 4, 2020). Assessing Capacity to Social Distance and Neighborhood-Level Health Disparities during the COVID-19 Pandemic. Pre-print downloaded June 5 from https://doi.org/10.1101/2020.06.02.20120790
June 4, 2020
Seroprevalence of SARS-CoV-2 in Hong Kong and in Residents Evacuated from Hubei Province, China: A Multicohort Study
Kai-Wang et al. conducted a seroepidemiology investigation using enzyme immunoassay and microneutralization assay on stored samples from before and after the start of the COVID-19 pandemic. They conclude that SARS-CoV-2 was not circulating in the Hong Kong population before the COVID-19 pandemic and that there was no increase in the seroprevalence from 2018 up until the second month of the COVID-19 outbreak in Hong Kong. Among…
SARS-CoV-2 RNA Detection on Disposable Wooden Chopsticks, Hong Kong
SARS-CoV-2 RNA was detected on disposable wooden chopsticks used by 5 consecutive asymptomatic and post-symptomatic patients. This demonstrates a potential that chopsticks or other dining utensils could be a vehicle for transmission. This has potential implications for communal meals, especially in communities with a custom of sharing dishes or utensils. Lui et al. (June 3, 2020). SARS-CoV-2 RNA Detection on Disposable Wooden Chopsticks, Hong Kong. Emerging…
June 3, 2020
Characteristics of U.S. Nursing Homes with COVID-19 Cases
Abrams et al. found that 2,949 (31%) of 9,395 nursing homes located in 30 states had at least one documented COVID-19 case. Nursing homes that were large, urban, and had a higher proportion of Black residents had a higher probability of reporting a COVID-19 case. Abrams et al. (June 2, 2020). Characteristics of U.S. Nursing…
Early Transmission of SARS-CoV-2 in South Africa: An Epidemiological and Phylogenetic Report
[pre-print, not peer reviewed] Using genomic surveillance and phylogenetic methods, Giandhari et al. found evidence of multiple international introductions and high rates of SARS-CoV-2 transmission in Western and Eastern Cape regions of South Africa. They also found evidence for a localized outbreak in a hospital in Durban, potentially explaining the initially high death rates reported in that province. This study highlights the potential role for genomics…
June 2, 2020
Safety of Breastfeeding in Mothers with SARS-CoV-2 Infection
[pre-print, not peer reviewed] A small study (n=23) of postpartum women with confirmed or suspected COVID-19 did not find SARS-CoV-2 in any breast milk samples. Presence of IgM in breast milk correlated with detection in maternal blood. IgG for SARS-CoV-2 was not found in any breast milk samples. Of the 8 infants that were tested one month after birth, all results were negative for SARS-CoV-2. These findings suggest that breast milk may not be…
Quantitative Assessment of the Risk of Airborne Transmission of SARS-CoV-2 Infection Prospective and Retrospective Applications
[pre-print, not peer reviewed] Buonanno et al. present a 4-step approach for quantitatively assessing infection risk in the presence of an asymptomatic COVID-19 subject in naturally–ventilated indoor environments, asserting that exposure time should be no longer than 20 minutes to limit the individual risk of infection to no more than 1%. After retrospectively assessing prior outbreaks such as in a restaurant in Guangzhou, China, and a choir rehearsal in Mount Vernon,…
Pathogenesis Transmission and Response to Re-Exposure of SARS-CoV-2 in Domestic Cats
[pre-print, not peer reviewed] Bosco-Lauth et al. showed that cats are susceptible to subclinical infection with SARS-CoV-2, capable of direct transmission to other cats, have prolonged viral shedding for up to 5 days, and develop a neutralizing antibody response that prevents reinfection. Dogs also developed an antibody response but were found to not shed the virus after infection. None of the animals exhibited any clinical…
Previous page Next page