Question: Which virus that causes respiratory problems and is being studied in laboratories in big cities around the globe was discovered by a former President of the Chinese Medical Association?

Context paragraphs:
Hong Kong Medical Association: The Hong Kong Medical Association (HKMA; ), formerly called the Hong Kong Chinese Medical Association, is a medical association based in Hong Kong.

Kgosi Letlape: Dr Kgosi Letlape is an ophthalmologist and health care leader from South Africa.  He is the current President of the Health Professions Council of South Africa (HPSCA).  He founded the African Medical Association in 2006, and is former chairman of the South African Medical Association (SAMA), past president of the World Medical Association (WMA) and former Executive Director of the Tshepang Trust.  He also serves as a member of The Global Hygiene Council.

Chinese Medical Journal: The Chinese Medical Journal is an official publication of Chinese Medical Association, co-published by Chinese Medical Association Publishing House and Wolters Kluwer Medknow.  The journal publishes peer-reviewed English-language articles, covering technical and clinical studies related to health, as well as ethical and social issues in medical research.

Human respiratory syncytial virus: Human respiratory syncytial virus (HRSV) is a syncytial virus that causes respiratory tract infections.  It is a major cause of lower respiratory tract infections and hospital visits during infancy and childhood.  A prophylactic medication, palivizumab, can be employed to prevent HRSV in preterm (under 35 weeks gestation) infants, infants with certain congenital heart defects (CHD) or bronchopulmonary dysplasia (BPD), and infants with congenital malformations of the airway.  Treatment is limited to supportive care, including oxygen therapy and more advanced breathing support with CPAP or nasal high flow oxygen.

Zhong Nanshan: Zhong Nanshan (; born 20 October 1936) is a Chinese pulmonologist, who discovered the SARS coronavirus in 2003.  He was the President of the Chinese Medical Association from 2005 to 2009 and is currently the editor-in-chief of the "Journal of Thoracic Disease".  He is most well known for managing the SARS outbreak in Guangdong province in 2003.  He was voted one of China's top 10 scientists in 2010.

SARS coronavirus: 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.

W. Dennis Kendig: Walter Dennis Kendig (May 29, 1880 – March 16, 1948) was a Virginian politician.  He was born in Spotsylvania County, Virginia on his father's farm on May 29, 1880 to Samuel E. Kendig and Miverva Eudora Fleming.  He had a twin brother, Benjamin, and they were the eldest of 8 children.  Kendig was educated at Bell Air Academy in Lewiston, Virginia and graduated from the Medical College of Virginia in 1905 as a physician and surgeon.  He married Helen Murray Yates and they settled in Kenbridge in Lunenburg County where Dr. Kendig was active in the Baptist Church, the Masons, Phi Beta Pi, Kenbridge Chamber of Commerce (former president).  He was also on the Board of Visitors of Medical College of Virginia, the Board of Directors of the Bank of Lunenburg, Past President of the Fourth District Medical Society, Medical Society of Virginia (vice president, former member of council and chairman, ethics committee), Southern Medical Association, American Medical Association, Lunenburg County Medical Society (past president), Southside Medical Society.

Chinese Journal of Integrative Medicine: The Chinese Journal of Integrative Medicine is a quarterly peer-reviewed medical journal covering integrative and alternative medicine.  It was established in 1995 as the Chinese Journal of Integrated Traditional and Western Medicine, obtaining its current name in 2003.  The journal is published by Springer Science+Business Media, and sponsored by both the Chinese Association of Integrative Medicine and China Academy of Chinese Medical Sciences.  The editor-in-chief is Keji Chen (China Academy of Chinese Medical Sciences).  According to the "Journal Citation Reports", the journal has a 2014 impact factor of 1.217.

Harvey N. Middleton: Harvey N. Middleton (February 15, 1895 – March 18, 1978) was a physician and cardiologist in Indianapolis, Indiana, who is best known for his efforts to open opportunities for black physicians to serve on the staffs of Indianapolis hospitals and for his community service.  Middleton was born in Denmark, South Carolina, and received a bachelor of arts degree from Benedict College (1919) in Columbia, South Carolina.  He attended two years of medical school at Boston University before transferring to Meharry Medical College, in Nashville, Tennessee, where he received a medical degree (M.D.) in 1926.  Middleton took short courses for additional training at Harvard University; the University of London, England; the University of Michigan; Indiana University; and Michael Reese Hospital in Chicago.  In 1928 Middleton moved to Anderson, Indiana, where he joined the staff of Saint Johns Hospital.  Around 1935 he relocated to Indianapolis, established a private medical practice, and volunteered at Indianapolis General (City) Hospital's outpatient heart clinic.  Middleton was accepted as a member of City Hospital staff in 1942 and joined the staffs at other Indianapolis hospitals.  Middleton wrote several articles relating to cardiology that appear in state and national medical journals.  He was a member of the American Medical Association, the National Medical Association, the American Heart Association, the Indiana State Medical Association, the Hoosier State Medical Society, and others.

Chinese Medical Doctor Association: The Chinese Medical Doctor Association (CDMA) is a non-profit organization founded in 2002.  This organization is recognized by the Ministry of Civil Affairs of the People's Republic of China as a primary level national association.  CDMA is organized under the Medical Practitioners Act 1999.  It has been being developed as the largest and most influential medical association in China for now since it started.  Under this organization there are 26 local associations, 39 specialty sub-association, five special committees and 18 medical publications.

Supporting paragraphs: Zhong Nanshan SARS coronavirus
Answer: SARS coronavirus