Claim: Viral image Says 80% of novel coronavirus cases are "mild.
Verdict: SUPPORTS

Retrieved passages:
title: Coronaviridae
text: Coronaviridae Coronaviridae is a family of enveloped, positive-sense, single-stranded RNA viruses. The viral genome is 26–32 kb in length. Virions are spherical, 120–160 nm across ("Coronavirinae"), bacilliform, 170–200 by 75–88 nm ("Bafinivirus") or found as a mixture of both, with bacilliform particles characteristically bent into crescents ("Torovirus"). The particles are typically decorated with large (~20 nm), club- or petal-shaped surface projections (the “peplomers” or “spikes”), which in electron micrographs of spherical particles create an image reminiscent of the solar corona. Members of this family are thus referred to as "coronaviruses", as are members of the subfamily "Coronavirinae". The 5' and

title: Coronavirus
text: Coronavirus Coronaviruses are species of virus belonging to the subfamily "Coronavirinae" in the family "Coronaviridae", in the order Nidovirales. 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, and refers to the characteristic appearance of virions under electron microscopy (E.M.) with a fringe of large, bulbous surface projections creating an image reminiscent of a royal crown or of the solar corona.

title: Coronaviridae
text: selection and packaging is critical for developing antiviral strategies and viral expression vectors based on the coronavirus genome. Coronaviridae Coronaviridae is a family of enveloped, positive-sense, single-stranded RNA viruses. The viral genome is 26–32 kb in length. Virions are spherical, 120–160 nm across ("Coronavirinae"), bacilliform, 170–200 by 75–88 nm ("Bafinivirus") or found as a mixture of both, with bacilliform particles characteristically bent into crescents ("Torovirus"). The particles are typically decorated with large (~20 nm), club- or petal-shaped surface projections (the “peplomers” or “spikes”), which in electron micrographs of spherical particles create an image reminiscent of the solar corona. Members of

title: Human coronavirus NL63
text: in approximately 4.7% of common respiratory illnesses. Further studies confirmed that the virus is not an emerging virus, but rather one that continually circulates the human population. The first cases of the infection with HCoV-NL63 were found in young children with severe lower respiratory tract infections admitted to hospitals. While the clinical presentation of the virus can be severe, it has also been found in mild cases of respiratory infection. The comorbidity of HCoV-NL63 with other respiratory infections, has made the specific symptoms of the virus difficult to pinpoint. A study of clinical symptoms in HCoV-NL63 patients without secondary infection,

title: Human coronavirus OC43
text: cases occurring in the winter months. Human coronavirus OC43 Human coronavirus OC43 is an enveloped, positive-stranded RNA virus in the species "Betacoronavirus-1" (genus "Betacoronavirus", subfamily "Coronavirinae", family "Coronaviridae", order "Nidovirales"). Four HCoV-OC43 genotypes (A to D), have been identified with genotype D most likely arising from recombination. The complete genome sequencing of two genotype C and D strains and bootscan analysis shows recombination events between genotypes B and C in the generation of genotype D. Of 29 strains identified, none belong to the more ancient genotype A. Molecular clock analysis using spike and nucleocapsid genes dates the most recent common

title: SARS coronavirus
text: SARS coronavirus is a positive and single stranded RNA virus belonging to a family of enveloped coronaviruses. Its genome is about 29.7kb, which is one of the largest among RNA viruses. The SARS virus has 13 known genes and 14 known proteins. There are 265 nucleotides in the 5'UTR and 342 nucleotides in the 3'UTR. SARS is similar to other coronaviruses in that its genome expression starts with translation of two large ORFs, 1a and 1b, both of which are polyproteins. The functions of several of these proteins are known: ORFs 1a and 1b encode the replicase and there are

title: Coronavirus
text: in a small number of nucleotides. In 2003, following the outbreak of Severe acute respiratory syndrome (SARS) which had begun the prior year in Asia, and secondary cases elsewhere in the world, the World Health Organization (WHO) issued a press release stating that a novel coronavirus identified by a number of laboratories was the causative agent for SARS. The virus was officially named the SARS coronavirus (SARS-CoV). The epidemic resulted in over 8,000 infections, about 10% of which resulted in death. X-ray crystallography studies performed at the Advanced Light Source of Lawrence Berkeley National Laboratory have begun to give hope

title: 2012 Middle East respiratory syndrome coronavirus outbreak
text: of unknown origin. Of the six, two died. All the cases were reported to the European Centre for Disease Prevention and Control (ECDC). After the September identification of a novel CoV strain, a retroactive analysis of the hospital workers was performed. Epidemiologists discovered the Jordan cases. Using stored laboratory samples for all six, it was found that samples from the two patients who had died tested positive for nCoV. On 24 April 2014, a 25-year-old male was found positive for the coronavirus. He had history of exposure to camels and had consumed camel milk. The Ministry of Health and Medical

title: Coronaviridae
text: responsible for the helical symmetry of the nucleocapsid that encloses the genomic RNA. Group: ssRNA(+) There are currently a total of 25 species assigned to this family, twenty of which belong to the subfamily "Coronavirinae". Coronaviruses are transmitted by faecal-oral route or by aerosols of respiratory secretions. Coronaviruses infect a wide range of mammals and birds and occur worldwide. Although most diseases are mild, sometimes they can cause more severe situations in humans, such as, for example, the infection of the respiratory tract known as Severe Acute Respiratory Syndrome (SARS). They can also cause enteric infections in very young infants

title: 2012 Middle East respiratory syndrome coronavirus outbreak
text: and from that family at least one additional person presented similar symptoms but tested negative for the novel coronavirus. On 21 February 2013, WHO stated that there had been 13 laboratory-confirmed cases, 6 cases (4 fatal) from Saudi Arabia, 2 cases (both fatal) from Jordan, 2 cases from Qatar, and 3 from the UK. In March 2013, the Saudi Arabia Ministry of Health reported the death of a 39-year-old man, the 15th case and 9th death reported to WHO. On 2 May 2013, the Saudi Ministry of Health announced five people died and two other people were in critical condition

title: Transmissible gastroenteritis coronavirus
text: negative strand is synthesized to serve as a template for transcribing RNAs of one genome size and several subgenome sized RNAs. The E2 protein forms a petal-shaped 20 nm long projection from the virus's surface. The E2 protein is thought to be involved in pathogenesis by helping the virus enter the host cytoplasm. The E2 protein initially has 1447residues, and then a short hydrophobic sequence is cleaved. After glycosylation of the protein in the golgi, the protein is then incorporated into the new virus. There are several functional domains within the E2 protein. A 20 residue hydrophobic segment at the

title: Avian infectious bronchitis
text: shell and poor albumen (watery), and are not marketable or proper for incubation. Normally-colored eggs, indicative of normal shells for instance in brown chickens, have a normal hatchability. Egg yield curve may never return to normal. Milder strains may allow normal production after around eight weeks. IBV was the first coronavirus described and varies greatly genetically and phenotypically, with hundreds of serotypes and strains described. Coronaviruses contain the largest known viral RNA genome in number of nucleotides, of approximately 30,000 bases. The RNA forms a single strand and single segment. IBV diversity is based on transcriptional error, which may become

title: Middle East respiratory syndrome coronavirus
text: endemic human betacoronaviruses HCoV-OC43 and HCoV-HKU1. Until 23 May 2013, MERS-CoV had frequently been referred to as a SARS-like virus, or simply the novel coronavirus, and earlier it was referred to colloquially on messageboards as the "Saudi SARS". Over 2,000 cases of MERS have been reported by 2017 and the case fatality rate is >30%. 182 genomes have been sequenced by 2015 (94 from humans and 88 from dromedary camels). All sequences are >99% similar. The genomes can be divided into two clades - A and B - with the majority of cases being caused by clade B. Human and

title: Coronavirinae
text: Coronavirinae Coronavirinae is one of two subfamilies in the family Coronaviridae. It is subdivided into the genera alphacoronavirus, betacoronavirus, gammacoronavirus, and deltacoronavirus. These include phylogenetically compact genogroups of enveloped, positive-sense, single-stranded RNA and with a nucleocapsid of helical symmetry. The genomic size of coronaviruses ranges from approximately 26 to 32 kilobases, extraordinarily large for an RNA virus. Their numbers are growing rapidly with several novel coronaviruses being recently discovered including Middle East respiratory syndrome coronavirus MERS-CoV discovered in 2012. The genus alphacoronavirus (formerly known as Coronavirus group 1 (CoV-1)) includes subgroups 1a and 1b, which are prototyped by human coronavirus

title: Betacoronavirus
text: bat gene pool. SARS-CoV virus causes SARS disease, and MERS-CoV virus causes Middle East respiratory syndrome (MERS) disease. Coronaviruses have a large genome size that ranges from 26 to 32 kilobases. As of May 2013, GenBank has 46 published complete genomes of the α-(group 1), β-(group 2), γ-(group 3), and δ-(group 4) CoVs. Within the genus Betacoronavirus (Group 2 CoV), four lineages (a, b, c, and d) are commonly recognized. The viruses of lineage A differ from all others in the genus in that they have a shorter spike-like protein called hemagglutinin esterase (HE). The name Coronavirus is derived from

title: SARS coronavirus
text: lipid envelope. The size of these particles are about 80–90 nm. SARS is most closely related to group 2 coronaviruses, but it does not segregate into any of the other three groups of coronaviruses. A theory has been proposed that bat coronaviruses have been coevolved with their hosts for a long time then jumped species from bats to humans. The closest outgroup to the coronaviruses are the toroviruses, with which it has homology in the ORF 1b replicase and the two viron proteins of S and M. SARS was determined to be an early split off from the group 2

title: Human coronavirus NL63
text: Researchers have suggested that more comprehensive, population-based studies are necessary to determine the effects of this virus on systems outside of the respiratory tract. Human coronavirus NL63 Human coronavirus NL63 or HCoV-NL63 is a species of coronavirus that was identified in late 2004 in a seven-month-old child with bronchiolitis in the Netherlands. Infection with the virus has been confirmed worldwide, and has an association with many common symptoms and diseases. Associated diseases include mild to moderate upper respiratory tract infections, severe lower respiratory tract infection, croup and bronchiolitis. The virus is found primarily in young children, the elderly, and immunocompromised

title: Coronavirus
text: 1960s from the nasal cavities of patients with the common cold. These viruses were subsequently named human coronavirus 229E and human coronavirus OC43. Two further members of this family have been identified (HCoV NL63 in 2004 and HKU1 in 2005) and they have been involved in more serious respiratory tract infections. Coronaviruses primarily infect the upper respiratory and gastrointestinal tract of mammals and birds. Six different currently known strains of coronaviruses infect humans. Coronaviruses are believed to cause a significant percentage of all common colds in human adults and children. Coronaviruses cause colds with major symptoms, e.g. fever, throat congestion

title: Coronavirus
text: 2013, a case of contamination from human to human in France was confirmed by the French Ministry of Social Affairs and Health. In addition, cases of person-to-person transmission have been reported by the Ministry of Health in Tunisia. Two confirmed cases seem to have caught the disease from their late father, who became ill after a visit to Qatar and Saudi Arabia. By Oct. 30 2013, there were 124 cases and 52 deaths in Saudi Arabia. After the Dutch Erasmus Medical Centre sequenced the virus, the virus was given a new name, Human Corona Virus-Erasmus Medical Centre (HCoV-EMC). The final

title: Coronaviridae
text: cellular receptor for MERS-CoV is CD24, found in smooth muscle cells, pneumocytes, and bronchiolar epithelial cells. There is a sensitive and specific RT-qPCR assay available for detection of MERS-CoV. Coronaviruses bind to host cells primarily through interactions between viral spike glycoproteins and specific host cell surface glycoproteins. Some coronaviruses also bind to sialic acids on glycoproteins and glycolipids via their spike and/or hemaglutinin esterase glycoproteins. The interactions between coronaviruses and host cell receptors are critical determinants of species-specificity, tissue tropism, and virulence. Coronaviruses have single-stranded, positive-sense RNA genomes of 26-30 kilobases, by far the largest non-segmented RNA virus genomes currently