from the fighting-colds,-Alzheimers,-and-MS dept.
Quebec researchers have discovered that a mutation in a coronavirus protein slows the spread of the virus in the central nervous system and reduces its neurovirulence. It is the first time that this phenomenon has been observed in the coronavirus family, which is responsible for one-third of common colds and is also suspected of being associated with the development or aggravation of neurological diseases such as multiple sclerosis, Alzheimer's disease, and encephalitis. The discovery, which has just been published in the journal PLoS Pathogens, was achieved in the Laboratory of Neuroimmunovirology at INRS-Institut Armand-Frappier.
In analyzing more than 60 human respiratory tract samples from patients infected by the human coronavirus, researchers discovered an important mutation in the S protein that modifies the virus capacity to infect nerve cells. The mutation is associated with the degree of viral virulence.
Multiple Soylentils have submitted stories regarding the 2019-nCoV coronavirus which is believed to have originated in the city of Wuhan, China in December 2019. Rather than have a smattering of stories appear on the site, they have been gathered here in one story. Read on if you are interested; otherwise another story will be along presently.
Even though it has only been a short while since our last round-up there are 22 separate stories merged into this round-up. Many report duplicate news but, nevertheless, we have tried to distill the important elements of each submission.
Firstly, there is some confusion regarding the actual names that are reported for the virus, the disease that it causes, and names frequently seen in media reporting. From https://www.nature.com/articles/s41564-020-0695-z:
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2.
In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
There is much more information at the link provided.
Secondly, as this is a fusion of stories received over the last week or so take all quoted figures of casualties as possibly out-of-date. At the time of merging these stories (12 Mar 20) there have been 127,863 confirmed cases world-wide resulting in 4,717 deaths. 68,309 people have already recovered with the remainder either in self-imposed or advisory isolation, in basic hospital care and a relatively small number in critical care. The pandemic has affected 116 countries/regions. Source: https://www.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6 - a graphical display produced by Johns Hopkins University (JHU).
Many countries have taken emergency measures to restrict travel or large gatherings of people. As this is a very fluid situation we suggest you refer to the media of any specific country in which you have an interest. President Trump has banned transatlantic air travel from countries in mainland Europe to the USA from Friday 2020-03-13 at 23:59 (no timezone stated) for a period initially of 30 days, and air travel within Europe is also significantly disrupted.