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What caused the COVID-19 outbreak?

ANSWER

Doctors aren’t sure, but they think it might have started in animals and spread to people.

SOURCES:

European Centre for Disease Prevention and Control: “Disease background of COVID-19.”

World Health Organization: “Coronavirus disease (COVID-19) advice for the public,” "Coronavirus Infections," “Middle East respiratory syndrome coronavirus (MERS-CoV),” “Naming the coronavirus disease (COVID-19) and the virus that causes it,” “Novel Coronavirus(2019-nCoV) Situation Report - 11,” "Novel Coronavirus(2019-nCoV) Situation Report - 22." “Q&A on coronaviruses (COVID-19)."

CDC: "2019 Novel Coronavirus (2019-nCoV), Wuhan, China,” “CDC Confirms Possible Instance of Community Spread of COVID-19 in U.S.,” "Coronavirus," “Coronavirus Disease 2019 (COVID-19).”

The Lancet: “Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study.”

Elsevier: “Novel Coronavirus Information Center.”

University of California, San Francisco: “How the New Coronavirus Spreads and Progresses – And Why One Test May Not Be Enough.”

Harvard Health Publishing: “As coronavirus spreads, many questions and some answers,” “Coronavirus Resource Center.”

Cleveland Clinic: “Frequently Asked Questions about Coronavirus Disease 2019 (COVID-19).”

National Institutes of Health: “NIH clinical trial of remdesivir to treat COVID-19 begins,” “Structural Biology Points Way to Coronavirus Vaccine.”

Journal of Virology : "Middle East Respiratory Syndrome Coronavirus (MERS-CoV); Announcement of the Coronavirus Study Group."

Journal of the American Medical Association News: "French Researchers: For Now, Middle Eastern Coronavirus Not Likely to Cause a Pandemic."

Johns Hopkins Medicine: "Upper Respiratory Infection (URI) or Common Cold."

Occupational Safety and Health Administration: “COVID-19.”

National Science Review : “On the origin and continuing evolution of SARS-CoV-2.”

World Health Organization: “Coronavirus disease (COVID-19) advice for the public: Myth busters,” “Report of the WHO-China Joint Mission on Coronavirus Disease 2019 (COVID-19).”

EClinical Medicine : “The coronavirus 2019-nCoV epidemic: Is hindsight 20/20?”

CDC: “CDC Confirms Possible Instance of Community Spread of COVID-19,” “Coronavirus Disease 2019 (COVID-19).”

The New England Journal of Medicine : “Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARS-CoV-1.”

National Center for Complementary and Integrative Health: “In the News: Coronavirus and ‘Alternative’ Treatments.”

National Institutes of Health: “NIH clinical trial of investigational vaccine for COVID-19 begins.”

Yale School of Medicine: “The Ins and Outs of COVID-19 Testing. Who is being tested? What are tests looking for? When might we have a vaccine?”

FDA: “Coronavirus (COVID-19) Update: FDA Alerts Consumers About Unauthorized Fraudulent COVID-19 Test Kits.”

American Family Physician : “Aspirin Use in Children for Fever or Viral Syndromes.”

European Medicines Agency: “EMA gives advice on the use of non-steroidal anti-inflammatories for COVID-19.”

The BMJ : “Covid-19: ibuprofen should not be used for managing symptoms, say doctors and scientist.”

Medscape: “Coronavirus Disease 2019 (COVID-19) Treatment & Management.”

The Hospitalist : “CDC expert answers top COVID-19 questions.”

Reviewed by Michael W. Smith on August 21, 2020

SOURCES:

European Centre for Disease Prevention and Control: “Disease background of COVID-19.”

World Health Organization: “Coronavirus disease (COVID-19) advice for the public,” "Coronavirus Infections," “Middle East respiratory syndrome coronavirus (MERS-CoV),” “Naming the coronavirus disease (COVID-19) and the virus that causes it,” “Novel Coronavirus(2019-nCoV) Situation Report - 11,” "Novel Coronavirus(2019-nCoV) Situation Report - 22." “Q&A on coronaviruses (COVID-19)."

CDC: "2019 Novel Coronavirus (2019-nCoV), Wuhan, China,” “CDC Confirms Possible Instance of Community Spread of COVID-19 in U.S.,” "Coronavirus," “Coronavirus Disease 2019 (COVID-19).”

The Lancet: “Epidemiological and clinical characteristics of 99 cases of 2019 novel coronavirus pneumonia in Wuhan, China: a descriptive study.”

Elsevier: “Novel Coronavirus Information Center.”

University of California, San Francisco: “How the New Coronavirus Spreads and Progresses – And Why One Test May Not Be Enough.”

Harvard Health Publishing: “As coronavirus spreads, many questions and some answers,” “Coronavirus Resource Center.”

Cleveland Clinic: “Frequently Asked Questions about Coronavirus Disease 2019 (COVID-19).”

National Institutes of Health: “NIH clinical trial of remdesivir to treat COVID-19 begins,” “Structural Biology Points Way to Coronavirus Vaccine.”

Journal of Virology : "Middle East Respiratory Syndrome Coronavirus (MERS-CoV); Announcement of the Coronavirus Study Group."

Journal of the American Medical Association News: "French Researchers: For Now, Middle Eastern Coronavirus Not Likely to Cause a Pandemic."

Johns Hopkins Medicine: "Upper Respiratory Infection (URI) or Common Cold."

Occupational Safety and Health Administration: “COVID-19.”

National Science Review : “On the origin and continuing evolution of SARS-CoV-2.”

World Health Organization: “Coronavirus disease (COVID-19) advice for the public: Myth busters,” “Report of the WHO-China Joint Mission on Coronavirus Disease 2019 (COVID-19).”

EClinical Medicine : “The coronavirus 2019-nCoV epidemic: Is hindsight 20/20?”

CDC: “CDC Confirms Possible Instance of Community Spread of COVID-19,” “Coronavirus Disease 2019 (COVID-19).”

The New England Journal of Medicine : “Aerosol and Surface Stability of SARS-CoV-2 as Compared with SARS-CoV-1.”

National Center for Complementary and Integrative Health: “In the News: Coronavirus and ‘Alternative’ Treatments.”

National Institutes of Health: “NIH clinical trial of investigational vaccine for COVID-19 begins.”

Yale School of Medicine: “The Ins and Outs of COVID-19 Testing. Who is being tested? What are tests looking for? When might we have a vaccine?”

FDA: “Coronavirus (COVID-19) Update: FDA Alerts Consumers About Unauthorized Fraudulent COVID-19 Test Kits.”

American Family Physician : “Aspirin Use in Children for Fever or Viral Syndromes.”

European Medicines Agency: “EMA gives advice on the use of non-steroidal anti-inflammatories for COVID-19.”

The BMJ : “Covid-19: ibuprofen should not be used for managing symptoms, say doctors and scientist.”

Medscape: “Coronavirus Disease 2019 (COVID-19) Treatment & Management.”

The Hospitalist : “CDC expert answers top COVID-19 questions.”

Reviewed by Michael W. Smith on August 21, 2020

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How does COVID-19 spread?

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