SARS coronavirus main proteinase (EC 3.4.22.69 , "3cLpro", "3C-like protease", "coronavirus 3C-like protease", "Mpro", "SARS 3C-like protease", "SARS coronavirus 3CL protease", "SARS coronavirus main peptidase", "SARS coronavirus main protease", "SARS-CoV 3CLpro enzyme", "SARS-CoV main protease", "SARS-CoV Mpro", "severe acute respiratory syndrome coronavirus main protease") is an enzyme.
 This enzyme catalyses the following chemical reaction
Feline viral rhinotracheitis (FVR) is an upper respiratory or pulmonary infection of cats caused by "feline herpesvirus 1", of the family "Herpesviridae".
 It is also commonly referred to as feline influenza, feline coryza, and feline pneumonia but, as these terms describe other very distinct collections of respiratory symptoms, they are misnomers for the condition.
 Viral respiratory diseases in cats can be serious, especially in catteries and kennels. Causing one-half of the respiratory diseases in cats, FVR is the most important of these diseases and is found worldwide.
 The other important cause of feline respiratory disease is "feline calicivirus".
The SARS coronavirus, sometimes shortened to SARS-CoV, is the virus that causes severe acute respiratory syndrome (SARS).
 On April 16, 2003, following the outbreak of SARS in Asia and secondary cases elsewhere in the world, the World Health Organization (WHO) issued a press release stating that the coronavirus identified by a number of laboratories was the official cause of SARS.
 Samples of the virus are being held in laboratories in New York City, San Francisco, Manila, Hong Kong, and Toronto.
In molecular biology, SARS coronavirus X4 like protein domain is commonly shortened to SARS-X4.
 This protein domain is only found in viruses.
 It causes SARS Severe acute respiratory syndrome in humans which causes high rates of mortality.
 It is produced by a type of virus named the coronavirus (SARS-CoV).
 X4 is the protein domain which is a unique type I transmembrane protein.
SARS is severe acute respiratory syndrome, a viral respiratory disease of zoonotic origin caused by the SARS coronavirus.
Avian infectious bronchitis (IB) is an acute and highly contagious respiratory disease of chickens.
 The disease is caused by avian infectious bronchitis virus (IBV), a coronavirus, and characterized by respiratory signs including gasping, coughing, sneezing, tracheal rales, and nasal discharge.
 In young chickens, severe respiratory distress may occur.
 In layers, respiratory distress, nephritis, decrease in egg production, and loss of internal (watery egg white) and external (fragile, soft, irregular or rough shells, shell-less) egg quality are reported.
Severe acute respiratory syndrome (SARS) is a viral respiratory disease of zoonotic origin caused by the SARS coronavirus (SARS-CoV).
 Between November 2002 and July 2003, an outbreak of SARS in southern China caused an eventual 8,098 cases, resulting in 774 deaths reported in 37 countries, with the majority of cases in Hong Kong (9.6% fatality rate) according to the World Health Organization (WHO).
 No cases of SARS have been reported worldwide since 2004.
The SARS conspiracy theory began to emerge during the severe acute respiratory syndrome (SARS) outbreak in China in the spring of 2003, when Sergei Kolesnikov, a Russian scientist and a member of the Russian Academy of Medical Sciences, first publicized his claim that the SARS coronavirus is a synthesis of measles and mumps.
 According to Kolesnikov, this combination cannot be formed in the natural world and thus the SARS virus must have been produced under laboratory conditions.
 Another Russian scientist, Nikolai Filatov, head of Moscow's epidemiological services, had earlier commented that the SARS virus was probably man-made.
Chronic Mycoplasma pneumonia and Chlamydia pneumonia infections are associated with the onset and exacerbation of asthma.
 These microbial infections result in chronic lower airway inflammation, impaired mucociliary clearance, an increase in mucous production and eventually asthma.
 Furthermore, children who experience severe viral respiratory infections early in life have a high possibility of having asthma later in their childhood.
 These viral respiratory infections are mostly caused by respiratory syncytial virus (RSV) and human rhinovirus (HRV).
 Although RSV infections increase the risk of asthma in early childhood, the association between asthma and RSV decreases with increasing age.
 HRV on the other hand is an important cause of bronchiolitis and is strongly associated with asthma development.
 In children and adults with established asthma, viral upper respiratory tract infections (URIs), especially HRVs infections, can produce acute exacerbations of asthma.
 Thus, "Chlamydia pneumoniae", "Mycoplasma pneumoniae" and human rhinoviruses are microbes that play a major role in non-atopic asthma.
Yi Guan is a Chinese virologist who, in 2014, was ranked as 11th in the world by Thomson Reuters (now known as Clarivate Analytics) among global researchers in the field of microbiology.
 His research on the viral respiratory disease SARS allowed the Chinese government to successfully avert the 2004 outbreak of this disease.
 He is the current Director (China affairs) of the State Key Laboratory for Emerging Infectious Diseases University of Hong Kong.
 In early 2017, Guan warned that the H7N9 influenza virus "poses the greatest threat to humanity than any other in the past 100 years."

Question: What is a viral respiratory disease of zoonotic origin caused by the SARS coronavirus, that was researched by a Chinese virologist who, in 2014, was ranked as 11th in the world by Thomson Reuters?
Answer: Severe acute respiratory syndrome