Draw and explain the CHAIN of INFECTION of COVID-19.
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Draw and explain the CHAIN of INFECTION of COVID-19.
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Human-to-human transmission of COVID-19 occurs primarily via three routes: (1) large particles that are expelled with sufficient momentum so as to directly impact the recipients’ mouth, nose, or conjunctiva; (2) physical contact with droplets deposited on a surface and subsequent transfer to the recipient’s respiratory mucosa; and (3) inhalation of aerosolized droplet nuclei delivered by ambient air currents. The first two routes associated with large droplets are referred to as the “droplet” and “contact” routes of transmission, whereas the third is referred to as “airborne” transmission.