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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.
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 ...
Transmission electron micrograph of SARS‑CoV‑2 virions (red) isolated from a patient during the COVID-19 pandemic A distinguishing feature of SARS‑CoV‑2 is its incorporation of a polybasic site cleaved by furin , [ 102 ] [ 112 ] which appears to be an important element enhancing its virulence. [ 113 ]
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 SARS-CoV-2 that is considered most plausible by the scientific community.
A visualization of contact tracing Transmission chains. Contact tracing generally involves the following steps as provided by CDC: [7] Notification of exposure: An individual is identified as having a communicable disease (often called the index case). [7] This case may be reported to public health or managed by the primary health care provider ...
You can also check the U.S. Department of Health and Human Services’ Community-Based Testing Sites for COVID-19 website to find testing locations, health centers, pharmacies, and other resources ...
Transmission and life-cycle of SARS-CoV-2 causing COVID-19. Coronaviruses vary significantly in risk factor. Some can kill more than 30% of those infected, such as MERS-CoV, and some are relatively harmless, such as the common cold. [49] Coronaviruses can cause colds with major symptoms, such as fever, and a sore throat from swollen adenoids. [91]
Dr. Watkins also reminds us that the best way to prevent respiratory infection is to get the flu, COVID-19, and RSV vaccines. “Don’t wait, the life you save can be your own.” “Don’t wait ...
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