Covid19-Sources

The dispersion of viral droplets plays a key role in the transmission of COVID-19. In this work, we analyze the dispersion of cough-generated droplets in the wake of a walking person for different ...

Transmission of SARS-CoV-2 leading to COVID-19 occurs through exhaled respiratory droplets from infected humans. Currently, however, there is much controversy over whether respiratory aerosol micro...

Presymptomatic transmission of SARS-CoV-2 is estimated to account for a substantial proportion of COVID-19 cases.

Vorab: diese These ist noch gänzlich unbestätigt – im Endeffekt suche ich noch Leute, die sie genauer betrachten möchten. Ich vermute, dass der unerwartet starke Anstieg der Corona-Infektionen zu Beginn Oktober auch auf das Wetter zurückzuführen ist. Wichtig: selbst wenn die These zutrifft, so bedeutet das nicht, dass das Wetter der alleinige Grund ist. Werden … „These: ist das Wetter mitverantwortlich für den steilen Anstieg der Corona-Neuinfektionen Anfang Oktober?“ weiterlesen

The health measures used on public transport have helped prevent the virus spreading, an aerosols expert said.

PDF | Many national and international standards and guidelines on IAQ assessment have been developed worldwide. However, specific measurement protocols... | Find, read and cite all the research you need on ResearchGate

We have elucidated the transmission pathways of coronavirus disease 2019 (COVID-19) by analyzing the trend and mitigation measures in the three epicenters. Our results show that the airborne transmission route is highly virulent and dominant for the spread of COVID-19. The mitigation measures are discernable from the trends of the pandemic. Our analysis reveals that the difference with and without mandated face covering represents the determinant in shaping the trends of the pandemic. This protective measure significantly reduces the number of infections. Other mitigation measures, such as ...

The pathogen is proving a familiar adage: The dose makes the poison.

Aerosols are more important when it comes to transmitting COVID-19 than we thought six months ago—and we need to act accordingly.

Background There remains limited data on what variables affect the risk of transmission of SARS-CoV-2 and developing symptomatic Covid-19 and in particular the relationship to viral load (VL). Methods We analysed data collected in a trial of hydroxychloroquine post-exposure prophylaxis. Covid-19 cases and their contacts were identified through the local epidemiological surveillance system. VL, estimated by quantitative PCR, was assessed at enrollment, at day 14, and whenever the participant reported Covid-19-like symptoms. Risk of transmission, risk of developing symptomatic disease and inc...

Dass Deutschland in Sachen Pandemiebekämpfung nicht von Erfolgen aus Asien profitieren wollte, hat vor allem mit postkolonialer Ignoranz zu tun. Ein Essay.

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Oxford – Die 2 Mal tägliche inhalative Anwendung von Budesonid aus einem handelsüblichen Asthmaspray hat in einer offenen randomisierten Phase-2-Studie die... #Studie #COVID19 #Asthma #MedRxiv

Transmission of the virus can be dramatically reduced by well-fitted masks or double-masking, according to new research by the C.D.C.

CDC experts on masks: Community mask wearing substantially reduces transmission of #SARSCoV2 in 2 ways: 📍Source control of exhalation📍Protecting the wearer➡️ But they are *not equal*. CDC just advised double masking. Important explainer 🧵. https://t.co/vg75GGF03n pic.twitter.com/RB0X3ZLPTl— Eric Feigl-Ding (@DrEricDing) February 11, 2021

The Race between the Tortoise and the Hare

Experts have warned that schools must be reopened with caution, amid emerging evidence from Israel and Italy that more young children are being infected with new variants of covid-19. Paediatricians in Israel, which has surged ahead in vaccinating its adult population, reported a sharp rise in covid-19 infections among young people, with more than 50 000 children and teens testing positive in January—more than Israel saw in any month during the first and second waves. Yuli Edelstein, health minister, told the Jerusalem Post , “We got a letter from the Israeli Association of Paediatrics that...

Background Following the resurgence of the COVID-19 epidemic in the UK in late 2020 and the emergence of the new variant of the SARS-CoV-2 virus, B.1.1.7, a third national lockdown was imposed from January 5, 2021. Following the decline of COVID-19 cases over the remainder of January 2021, it is important to assess the conditions under which reopening schools from early March is likely to lead to resurgence of the epidemic. This study models the impact of a partial national lockdown with social distancing measures enacted in communities and workplaces under different strategies of reopening...

Historiker René Schlott und seine Antwort auf Thomas Brussig und seinen Text: "Mehr Diktatur wagen"

Researchers from the Princeton Environmental Institute find the continued spread of novel coronavirus SARS-CoV-2 is driven by only a small percentage of those who become infected.

Parallel molecular evolution is the independent evolution of the same genotype or phenotype from distinct ancestors. The simple genomes and rapid evolution of many viruses mean they are useful model systems for studying parallel evolution by natural selection. ...

Combining multiple behavioural and epidemiological data sources with mathematical models, we analysed the transmissibility and severity of novel SARS-CoV-2 Variant of Concern 202012/01 in England.

A study conducted by researchers in the UK and Spain suggests that viral load is the main determinant of transmission risk in cases of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection.