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Transmission of COVID-19. 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 ...
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
MERS-CoV is a virus in the coronavirus family believed to be originally from bats. [ 1] However, humans are typically infected from camels, either during direct contact or indirectly through respiratory droplets. [ 1] Spread between humans typically requires close contact with an infected person. [ 1]
SARS-CoV-2, the causative agent of COVID-19, was first introduced to humans through zoonosis (transmission of a pathogen to a human from an animal), and a zoonotic spillover event is the origin of COVID-19 that is considered most plausible by the scientific community. [a] Human coronaviruses including SARS-CoV-2 are zoonotic diseases that are ...
Betacoronavirus cameli [ 1] ( also known as Middle East respiratory syndrome–related coronavirus abbreviated as MERS-CoV ), [ 2] or EMC/2012 ( HCoV-EMC/2012 ), is the virus that causes Middle East respiratory syndrome (MERS). [ 3][ 4] It is a species of coronavirus which infects humans, bats, and camels. [ 5]
Severe acute respiratory syndrome (SARS) is the disease caused by SARS-CoV-1. It causes an often severe illness and is marked initially by systemic symptoms of muscle pain, headache, and fever, followed in 2–14 days by the onset of respiratory symptoms, [ 13] mainly cough, dyspnea, and pneumonia. Another common finding in SARS patients is a ...
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal. Mild illnesses in humans include some cases of the common cold (which is also caused by ...
783 known. Severe acute respiratory syndrome ( SARS) is a viral respiratory disease of zoonotic origin caused by the virus SARS-CoV-1, the first identified strain of the SARS-related coronavirus. [ 3] The first known cases occurred in November 2002, and the syndrome caused the 2002–2004 SARS outbreak.