a para on coronavirus of
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Explanation:
The novel coronavirus can spread through droplets emitted when an infected person speaks, according to new research on the virus’ alarming efficiency of transmission. So far, public health specialists had focused on coughing and sneezing as the most potential mediums of transmission of SARS-CoV-2.
Now, scientists from the National Institutes of Health (NIH), US, have come up with troubling new evidence of transmission in confined spaces. They used an intense sheet of highly sensitive laser light to visualize bursts of small-sized droplets produced during repeated spoken phrases. The droplets are too small to be seen, but are large enough to carry pathogens that can linger in the air “for tens of minutes or longer" before shrinking and eventually disappearing.
Answer:
Explanation:
Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, they 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 other viruses, predominantly rhinoviruses), while more lethal varieties can cause SARS, MERS, and COVID-19. In cows and pigs they cause diarrhea, while in mice they cause hepatitis and encephalomyelitis.
Coronaviruses constitute the subfamily Orthocoronavirinae, in the family Coronaviridae, order Nidovirales, and realm Riboviria.[5][4] They are enveloped viruses with a positive-sense single-stranded RNA genome and a nucleocapsid of helical symmetry.[6] The genome size of coronaviruses ranges from approximately 26 to 32 kilobases, one of the largest among RNA viruses.[7] They have characteristic club-shaped spikes that project from their surface, which in electron micrographs create an image reminiscent of the solar corona, from which their name derives.[8]