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STAR LABORATORY
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This video is about #Coronavirus , #Coronavirus #Symptoms and other details are explained clearly , provided by STAR LABORATORY, #What is Coronavirs? The tropic #Corona #Virus or #virusu is most popular disease in the current situation.
Coronaviruses (CoV) are a large family of viruses that cause illness ranging from the common cold to more severe diseases such as Middle East Respiratory Syndrome (MERS-CoV) and Severe Acute Respiratory Syndrome (SARS-CoV). A novel coronavirus (nCoV) is a new strain that has not been previously identified in humans.
For the ongoing outbreak, see 2019–20 Wuhan coronavirus outbreak. For the specific virus causing this outbreak, see Novel coronavirus (2019-nCoV).
Orthocoronavirinae
Coronaviruses 004 lores.jpg
Electron micrograph of Infectious bronchitis virus virions
2019-nCoV-CDC-23312.png
Render of 2019 nCoV virion
Virus classificatione
(unranked): Virus

The name "coronavirus" is derived from the Latin corona and the Greek κορώνη (korṓnē, "garland, wreath"), meaning crown or halo. This refers to the characteristic appearance of virions (the infective form of the virus) by electron microscopy, which have a fringe of large, bulbous surface projections creating an image reminiscent of a royal crown or of the solar corona. This morphology is created by the viral spike (S) peplomers, which are proteins that populate the surface of the virus and determine host tropism.

Proteins that contribute to the overall structure of all coronaviruses are the spike (S), envelope (E), membrane (M) and nucleocapsid (N). In the specific case of the SARS coronavirus (see below), a defined receptor-binding domain on S mediates the attachment of the virus to its cellular receptor, angiotensin-converting enzyme 2 (ACE2).[8] Some coronaviruses (specifically the members of Betacoronavirus subgroup A) also have a shorter spike-like protein called hemagglutinin esterase (HE).[4]
Realm: Riboviria
Phylum: incertae sedis
Order: Nidovirales
Family: Coronaviridae
Subfamily: Orthocoronavirinae
Genera[1]
Alphacoronavirus
Betacoronavirus
Deltacoronavirus
Gammacoronavirus
Synonyms[2][3]
Coronavirinae
Coronaviruses are a group of viruses that cause diseases in mammals and birds. In humans, the viruses cause respiratory infections which are typically mild including the common cold but rarer forms like SARS and MERS can be lethal. In cows and pigs they may cause diarrhea, while in chickens they can cause an upper respiratory disease. There are no vaccines or antiviral drugs that are approved for prevention or treatment.

Coronaviruses are viruses in the subfamily Orthocoronavirinae in the family Coronaviridae, in the order Nidovirales.[4][5] Coronaviruses are enveloped viruses with a positive-sense single-stranded RNA genome and with a nucleocapsid of helical symmetry. The genomic size of #coronaviruses ranges from approximately 26 to 32 kilobases, the largest for an RNA virus.

The name "coronavirus" is derived from the Latin corona, meaning crown or halo, which refers to the characteristic appearance of the virus particles (virions): they have a fringe reminiscent of a royal crown or of the solar corona.
#Novel coronavirus (2019-nCoV)
Main article: Novel coronavirus (2019-nCoV)
Cross-sectional model of a coronavirus
Cross-sectional model of a coronavirus
In December 2019, a pneumonia outbreak was reported in Wuhan, China. On 31 December 2019, the outbreak was traced to a novel strain of coronavirus,[40] which was labeled as 2019-nCoV by the World Health Organization (WHO).[26][27][41] According to Daniel Lucey at Georgetown University, the first human infections must have occurred in November 2019 and maybe earlier.[42]

By 29 January 2020, more than 130 deaths had been reported and more than 6,160 confirmed cases in this coronavirus pneumonia outbreak.[43][44][45][46] The Wuhan strain has been identified as a new strain of Betacoronavirus from group 2B with an ~70% genetic similarity to the SARS-CoV.[47] The virus was suspected to have originated in snakes,[48] but many leading researchers disagree with this conclusion.[49] Daniel Lucey, an infectious disease specialist at Georgetown University, stated that “Now it seems clear that [the] seafood market is not the only origin of the virus”.[42][50]