How many SARS-CoV2 viral particles are required to infect an immunocompetent adult? Are the infective doses are the same in children, immunocompromised adult and elderly persons?
Some experts estimate that exposure to as few as 1000 SARS-CoV-2 viral particles can cause an infection. This dose of virus could occur by inhaling 1000 infectious viral particles in a single breath, 100 viral particles in 10 breaths, or 10 viral particles in 100 breaths.
A single cough releases about 3,000 respiratory droplets that travel at 50 miles per hour. Most droplets are large, and quickly fall to the ground, but many remain airborne and can travel across a room in a few seconds. A single sneeze releases about 30,000 droplets traveling up to 200 miles per hour. Most droplets are small and travel great distances. The droplets from a single cough or a sneeze emitted by an infected person may contain as many as 200,000,000 virus particles.
please see
http://www.clinlabnavigator.com/sars-cov-2-infectious-dose.html
Some experts estimate that exposure to as few as 1000 SARS-CoV-2 viral particles can cause an infection. This dose of virus could occur by inhaling 1000 infectious viral particles in a single breath, 100 viral particles in 10 breaths, or 10 viral particles in 100 breaths.
A single cough releases about 3,000 respiratory droplets that travel at 50 miles per hour. Most droplets are large, and quickly fall to the ground, but many remain airborne and can travel across a room in a few seconds. A single sneeze releases about 30,000 droplets traveling up to 200 miles per hour. Most droplets are small and travel great distances. The droplets from a single cough or a sneeze emitted by an infected person may contain as many as 200,000,000 virus particles.
please see
http://www.clinlabnavigator.com/sars-cov-2-infectious-dose.html
Thanks Mutasem Z. Bani-Fwaz for your very useful contribution. You shared a link and a lot of information that might help a person to be enlightened regarding SARS-CoV2 transmission.
Thanks Emad Kamil Hussein for your kind response. Probably, the immune status of a person determines the symptoms and severity of the disease.
Some experts estimate that exposure to as few as 1000 SARS-CoV-2 viral particles can cause an infection. This dose of the virus could be attained by inhaling 1000 infectious viral particles in a single breath, 100 viral particles in 10 breaths, or 10 viral particles in 100 breaths.
Source:http://www.clinlabnavigator.com/sars-cov-2-infectious-dose.html
Methods of transmission of the virus that causes Covid-19 disease
Respiratory infection can be transmitted through droplets of different size as follows: If their particles have a diameter of between 5 and 10 micrometers, these particles are referred to as respiratory droplets. If its diameter is equal to 5 micrometers or less, it is referred to as droplet nuclei. 1 According to the current available evidence, infection with the virus that causes Covid-19 disease is transmitted mainly from one person to another through respiratory and contact droplets. 2-7 In an analysis of a total of 75,465 cases. COVID-19 infection in China, airborne transmission has not been reported
Dear Maged Gumaan Bin-Saad thanks for your contribution. You have added a note on COVID-19 transmission, I appreciate it.
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