That’s the word that one disease researcher uses to describe COVID-19. And now scientists are discovering the reasons that this virus is readily transmitted at “superspreader events.”
Full story of excerpts below at Source: >Superspreading Is A Hallmark Of The Coronavirus : Goats and Soda : NPR
“A person with a high viral load walks into a bar. That, according to researchers who study the novel coronavirus, is a recipe for a superspreading event — where one person or gathering leads to an unusually high number of new infections.
“And that kind of occurrence is increasingly considered a hallmark of the coronavirus that causes COVID-19. “There are some really good estimates out there that suggest that between 10% and 20% of cases are responsible for about 80% of transmission events.
“And two of the main reasons, say researchers, are the way this coronavirus spreads and the behavior of infected individuals. A key feature that helps this virus superspread is its ability to transmit through the air in closed indoor settings,
“It appears to spread efficiently from people who don’t yet know they’re sick. Leung says research shows that 40% of coronavirus transmission is taking place before a patient shows symptoms. And people may actually be most contagious the day or two before they start feeling sick.
“Viral load actually increases a couple of days before symptoms show up...The virus is spreading from one person’s respiratory tract to another’s — even though the person who’s spreading it may feel totally fine. It may come down to differences in biology, such as how much virus a person sheds in sighs and coughs and sneezes — or even how the virus comes out from the respiratory tract. That’s “bad news,” says Leung, and means that containing the coronavirus requires more intensive interventions than past disease outbreaks like SARS.