Result for
Topic: Transmission
April 10, 2020
Spatial Correlation of Particulate Matter Pollution and Death Rate of COVID-19
The authors conducted a cross-sectional analysis to examine spatial associations of daily PM2.5 and PM10 concentrations with COVID-19 death rate in China, finding that COVID-19 had higher death rates with increasing concentrations of either PM. This is consistent with past SARS research. Yao et al. (Apr 10, 2020). Spatial Correlation of Particulate Matter Pollution and…
April 7, 2020
Toilets dominate environmental detection of SARS-CoV-2 virus in a hospital
The authors tested 107 surface samples from 4 isolation rooms housing 10 COVID-19 patients in a Chinese hospital. Fecal-derived aerosols in the patients’ toilets contained most of the detected SARS-CoV-2 virus in the hospital, highlighting the importance of surface and hand hygiene for intervention as well as the importance of hygiene in both private and…
Why are pregnant women susceptible to COVID-19? An immunological Viewpoint
This article provides details on why pregnant women may be more susceptible to COVID-19, and the potential maternal and fetal complications from an immunological viewpoint. Pregnant women may be more susceptible to COVID-19 since pregnant women are vulnerable to respiratory infection in general. Liu et al reiterate that there is no evidence for vertical transmission…
April 6, 2020
Evidence that higher temperatures are associated with lower incidence of COVID-19 in pandemic state, cumulative cases reported up to March 27, 2020
Results from this study suggest there is some association between COVID-19 incidence and regions at or above 30° latitude N (i.e. China- 31°; Italy- 41°) and a breakpoint at 72.5°F at which a significant reduction of case rates was observed. While the study does not confirm the COVID-19 cannot survive or transmit in warm and…
Detection of 2019 novel coronavirus in semen and testicular biopsy specimen of COVID-19 patients.
Song et al conducted RT-PCR testing in semen samples from 12 patients who were in the recovery stage of COVID-19, and from a testicular tissue sample from 1 deceased patient. They found no evidence that SARS-CoV-2 can infect the male genital tract or testes, indicating that the virus cannot be sexually transmitted from males. Song…
Could SARS-CoV-2 be transmitted via speech droplets?
Anfinrud et al describe their use of laser light-scattering to detect SARS-CoV-2 droplet emission while speaking and suggest that it could be a major mode of transmission. While droplets emitted from speaking are smaller than those emitted when coughing or sneezing, they are sufficiently large to carry other respiratory pathogens, such as the measles virus…
Cryptic transmission of SARS-CoV-2 in Washington State
Bedford et al sequenced 346 SARS-CoV-2 genome from samples collected between February 20 and March 15 in Washington State. The majority of infections appeared to have derived from a single introduction event in late January or early February, suggesting cryptic spread of COVID-19 during the months of January and February. These findings highlight the critical…
April 3, 2020
Ambient nitrogen dioxide pollution and spread ability of COVID-19 in Chinese cities.
Yao et al report a significant association between nitrogen dioxide (NO2) exposure and R0, suggesting that ambient NO2 may contribute to the spread ability of COVID-19 in this ecological study. Previous studies have suggested that the increase spread ability from NO2 might not be caused by increased susceptibility to infection but may result from effects…
Monitoring trends and differences in COVID-19 case fatality rates using decomposition methods: Contributions of age structure and age-specific fatality.
The authors estimated population-level case fatality rates (CFR) for 7 countries (U.S. included) and New York City, and analyzed the age-structure of confirmed cases and the age-specific case-fatality. They report that the age-structure of cases likely reflects differences in testing regimes and transmission trajectories, and age-specific CFRs could indicate worsening health outcomes of those infected…
Vertical Transmission of Coronavirus Disease 19 (COVID-19) from Infected Pregnant Mothers to Neonates: A Review
The authors reviewed articles on a total of 31 pregnant women with COVID-19 up to March 4. They found no evidence for intrauterine transmission of COVID-19 from infected pregnant women to their fetuses. Mothers may be at increased risk for more severe respiratory complications. Mothers with known or suspected COVID-19 should adhere to standard and…
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