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An asymptomatic carrier is a person or other organism that has become infected with a pathogen, but shows no signs or symptoms.
In medicine, public health, and biology, transmission is the passing of a pathogen causing communicable disease from an infected host individual or group to a particular individual or group, regardless of whether the other individual was previously infected. The term strictly refers to the transmission of microorganisms directly from one individual to another by one or more of the following means:
Robert Ray Redfield Jr. is an American virologist who served as the Director of the U.S. Centers for Disease Control and Prevention and the Administrator of the Agency for Toxic Substances and Disease Registry from 2018 to 2021.
Walter Ian Lipkin is the John Snow Professor of Epidemiology at the Mailman School of Public Health at Columbia University and a professor of Neurology and Pathology at the College of Physicians and Surgeons at Columbia University. He is also director of the Center for Infection and Immunity, an academic laboratory for microbe hunting in acute and chronic diseases. Lipkin is internationally recognized for his work with West Nile virus, SARS and COVID-19.
In public health, social distancing, also called physical distancing, is a set of non-pharmaceutical interventions or measures intended to prevent the spread of a contagious disease by maintaining a physical distance between people and reducing the number of times people come into close contact with each other. It usually involves keeping a certain distance from others and avoiding gathering together in large groups.
Airborne transmission or aerosol transmission is transmission of an infectious disease through small particles suspended in the air. Infectious diseases capable of airborne transmission include many of considerable importance both in human and veterinary medicine. The relevant infectious agent may be viruses, bacteria, or fungi, and they may be spread through breathing, talking, coughing, sneezing, raising of dust, spraying of liquids, flushing toilets, or any activities which generate aerosol particles or droplets. This is the transmission of diseases via transmission of an infectious agent, and does not include diseases caused by air pollution.
A superspreading event (SSEV) is an event in which an infectious disease is spread much more than usual, while an unusually contagious organism infected with a disease is known as a superspreader. In the context of a human-borne illness, a superspreader is an individual who is more likely to infect others, compared with a typical infected person. Such superspreaders are of particular concern in epidemiology.
The COVID-19 pandemic, also known as the coronavirus pandemic, is a global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identified in an outbreak in the Chinese city of Wuhan in December 2019. Attempts to contain it there failed, allowing the virus to spread to other areas of Asia and later worldwide in 2020. The World Health Organization (WHO) declared the outbreak a public health emergency of international concern (PHEIC) on 30 January 2020. The WHO ended its PHEIC declaration on 5 May 2023. As of 21 September 2023, the pandemic had caused 761,768,995 cases and 6,784,168 confirmed deaths, ranking it fifth in the deadliest epidemics and pandemics in history.
Coronavirus disease 2019 (COVID-19) is a contagious disease caused by the virus SARS-CoV-2. The first known case was identified in Wuhan, China, in December 2019. The disease quickly spread worldwide, resulting in the COVID-19 pandemic.
Neil Morris Ferguson is a British epidemiologist and professor of mathematical biology, who specialises in the patterns of spread of infectious disease in humans and animals. He is the director of the Jameel Institute, and of the MRC Centre for Global Infectious Disease Analysis, and head of the Department of Infectious Disease Epidemiology in the School of Public Health and Vice-Dean for Academic Development in the Faculty of Medicine, all at Imperial College London.
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Caitlin M. Rivers is an American epidemiologist who as Senior Scholar at the Johns Hopkins Center for Health Security and assistant professor at the Johns Hopkins Bloomberg School of Public Health, specializing on improving epidemic preparedness. Rivers is currently working on the American response to the COVID-19 pandemic with a focus on the incorporation of infectious disease modeling and forecasting into public health decision making.
Allison Joan McGeer is a Canadian infectious disease specialist in the Sinai Health System, and a professor in the Department of Laboratory Medicine and Pathobiology at the University of Toronto. She also appointed at the Dalla Lana School of Public Health and a Senior Clinician Scientist at the Lunenfeld-Tanenbaum Research Institute, and is a partner of the National Collaborating Centre for Infectious Diseases. McGeer has led investigations into the severe acute respiratory syndrome outbreak in Toronto and worked alongside Donald Low. During the COVID-19 pandemic, McGeer has studied how SARS-CoV-2 survives in the air and has served on several provincial committees advising aspects of the Government of Ontario's pandemic response.
Peter Daszak is a British zoologist, consultant and public expert on disease ecology, in particular on zoonosis. He is the president of EcoHealth Alliance, a nonprofit non-governmental organization that supports various programs on global health and pandemic prevention. He is also a member of the Center for Infection and Immunity at the Columbia University Mailman School of Public Health. He lives in Suffern, New York.
The COVID-19 pandemic in Southeast Asia is part of the ongoing worldwide pandemic of coronavirus disease 2019 caused by severe acute respiratory syndrome coronavirus 2. It was confirmed to have spread to Southeast Asia on 13 January 2020, when a 61-year-old woman from Wuhan tested positive in Thailand, making it the first country other than China to report a case. The first death occurred on 2 February, involving a 44-year-old Chinese man in the Philippines, also the first outside China. By 24 March, all states in the region had announced at least one case.
The transmission of COVID-19 is the passing of coronavirus disease 2019 from person to person. COVID-19 is mainly transmitted when people breathe in air contaminated by droplets/aerosols and small airborne particles containing the virus. Infected people exhale those particles as they breathe, talk, cough, sneeze, or sing. Transmission is more likely the closer people are. However, infection can occur over longer distances, particularly indoors.
Jay Varma is a physician and epidemiologist who is the Executive Vice President and Chief Medical Officer of SIGA Technologies. He previously served as senior advisor for public health and COVID-19 to New York City Mayor Bill de Blasio.
Nicole M. Bouvier is an American physician who is Professor of Medicine at Icahn School of Medicine at Mount Sinai. Her research considers the environmental and viral factors that impact respiratory transmission of influenza viruses.
Anne Moscona is an American virologist and pediatrician. She is best known for identifying cell entry mechanisms for enveloped respiratory viruses, elucidating general infection mechanisms that apply to parainfluenza virus, Nipah virus, measles virus, and other viruses, and for applying this knowledge to identify antiviral strategies to prevent infection by viruses including SARS-CoV-2. She is frequently consulted as a medical expert during viral outbreaks, including epidemic and pandemic influenza. Since 2016, she has served as the Sherie L. Morrison Professor Microbiology & Immunology, Professor of Pediatrics, and Professor of Physiology & Cellular Biophysics at Columbia University Medical Center in New York City, where she directs the Center for Host Pathogen Interaction. In 2022, Moscona was elected as president of the American Society for Virology, the nation's leading virology research organization, and will lead the organization starting in July 2023. For the last two years she has served the American Society for Virology as Councilor for Medical Virology.
References
- ↑ "Jeffrey Shaman, PhD". Columbia University's Mailman School of Public Health. 2022-12-01. Retrieved 2023-03-27.
- ↑ Shaman, Jeffrey (2022-03-04). "Opinion | What Will Our Covid Future Be Like? Here Are Two Signs to Look Out For". The New York Times. ISSN 0362-4331 . Retrieved 2023-03-27.
- ↑ "Making Outbreak Models". Slate Magazine. 2020-03-23. Retrieved 2023-03-27.
- ↑ Glanz, James; Leatherby, Lauren; Bloch, Matthew; Smith, Mitch; Buchanan, Larry; Wu, Jin; Bogel-Burroughs, Nicholas (2020-03-20). "Coronavirus Could Overwhelm U.S. Without Urgent Action, Estimates Say". The New York Times. ISSN 0362-4331 . Retrieved 2023-03-27.
- ↑ Interlandi, Jeneen (2021-11-22). "Inside the C.D.C.'s Pandemic 'Weather Service'". The New York Times. ISSN 0362-4331 . Retrieved 2023-03-27.
- ↑ Shaman, Jeffrey (2022-01-06). "Opinion | Here's When We Expect Omicron to Peak". The New York Times. ISSN 0362-4331 . Retrieved 2023-03-27.
- ↑ Magazine, Smithsonian; Morrison, Jim. "A Virus Study You've Never Heard of Helped Us Understand COVID-19". Smithsonian Magazine. Retrieved 2023-03-27.
