Result for
Topic: Transmission
April 3, 2020
First Mildly Ill, Non-Hospitalized Case of Coronavirus Disease 2019 (COVID-19) Without Viral Transmission in the United States — Maricopa County, Arizona, 2020
This study describes the public health investigation of the first mildly ill, non-hospitalized U.S. COVID-19 case and demonstrates that SARS-CoV-2 infection can cause mild illness and result in positive tests for up to 18 days after diagnosis, without evidence of transmission to close contacts. These findings might inform public health strategies to manage individuals with…
COVID-19 Outbreak Associated with Air Conditioning in Restaurant, Guangzhou, China, 2020
Lu et al conduct a detailed investigation of 3 family clusters with COVID-19 who had eaten at the same air-conditioned restaurant in China and conclude that the key factor for infection was the direction of the airflow and that droplet transmission was prompted by air-conditioned ventilation. To prevent spread of COVID-19 in restaurants, the article…
SARS-CoV-2 is not detectable in the vaginal fluid of women with severe COVID-19 infection
Findings from a group of 10 post-menopausal women with confirmed severe COVID-19 pneumonia from 1 hospital in Wuhan suggest that SARS-CoV-2 does not enter the vaginal fluid. This suggests that that the likelihood of transmitting the virus to sexual partners through vaginal fluids may be low. Qiu et al. (Apr 2, 2020). SARS-CoV-2 is not…
April 2, 2020
Using observational data to quantify bias of traveller-derived COVID-19 prevalence estimates in Wuhan, China
Neihus et al use a Bayesian modelling approach to estimate various countries’ capacity to detect imported COVID-19 cases from Wuhan, using Singapore’s capacity as a gold standard. Findings suggest that the global weighted ability to detect cases was only 38% of Singapore’s capacity, ranging from 11% in locations with low surveillance capacity to 40% in…
The first three months of the COVID-19 epidemic: Epidemiological evidence for two separate strains of SARS-CoV-2 viruses spreading and implications for prevention strategies
Wittkowski summarizes the time-course of COVID-19 by country and region using raw case data, and suggests that different patterns in spread and lethality indicate the presence of at least 2 strains of SARS-CoV-2. His analysis predicts that US projections of peak prevalence and lethality may depend on which strain arrived first, and that containment of…
Environment and Personal Protective Equipment Tests for SARS–CoV-2 in the Isolation Room of an Infant With Infection
Samples were taken from an isolation environment and PPE used while treating a confirmed COVID-19 infant case with mild clinical symptoms. All 3 PPE samples tested negative for SARS-CoV-2, however multiple environmental samples were found to be positive. This investigation confirmed that a generally healthy infant with COVID-19 can contaminate the environment with PCR-detectable virus,…
Epidemiological Features of 135 Patients with Coronavirus Disease (COVID-19) in Tianjin, China
Cao et al describe the epidemiological features of the COVID-19 outbreak in Tianjin China, including 135 total cases and 3 deaths. Most early cases were identified from urban areas and/or had travelled to Hubei province, and familial clustering was the most important characteristic identified (58% of all cases). Cao et al. (April 1, 2020). Epidemiological…
Presymptomatic Transmission of SARS-CoV-2 — Singapore, January 23–March 16, 2020
Investigations of 243 COVID-19 cases in Singapore identified seven clusters of cases in which presymptomatic transmission likely occurred, accounting for at least 10 total new cases. Wei et al. (April 1, 2020). Presymptomatic Transmission of SARS-CoV-2 — Singapore, January 23–March 16, 2020. MMWR. https://www.cdc.gov/mmwr/volumes/69/wr/pdfs/mm6914e1-H.pdf
Asymptomatic and Human-to-Human Transmission of SARS-CoV-2 in a 2-Family Cluster, Xuzhou, China.
Li et al report findings from 7 patients in a 2-family cluster, confirming asymptomatic transmission through contacts in familial and hospital settings. Laboratory test results and medical therapies are described to provide a practical reference for diagnosis and treatment. Li et al. (April 2, 2020). Asymptomatic and Human-to-Human Transmission of SARS-CoV-2 in a 2-Family Cluster,…
March 31, 2020
Possible Transmission of SARS-CoV-2 in a Public Bath Center in Huai’an, Jiangsu Province, China.
While previous studies have demonstrated that the transmission rate of a virus is significantly weakened in environments with high temperature and humidity, a study on transmission of SARS-CoV-2 in a public bath center in China found that transmissibility showed no signs of weakening in warm and humid conditions. Luo et al. (Mar 30, 2020). Possible…
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