Wednesday, October 27, 2021

As few as 13% of people with coronavirus develop symptoms: study

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  • A new model suggests that only 13% to 18% of COVID-19 cases are symptomatic, according to data collected in New York from March to June.
  • This could mean that more than 80% of coronavirus infections are asymptomatic.
  • The model also suggested that non-symptomatic cases could account for at least 50% of transmission.
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One of the most dangerous characteristics of the coronavirus is that people who are infected usually pass it on to others before they know they are sick – or without ever developing symptoms.

Scientists continue to try to track the rate of asymptomatic coronavirus cases hidden in the population. The Centers for Disease Control and Prevention estimates that about 40% of COVID-19 cases are asymptomatic, and a study last month found that about 50% of transmission comes from people without symptoms.

Now a new study suggests that asymptomatic cases could account for a large majority of infections. Researchers at the University of Chicago created a model that incorporated antibody tests performed in New York from March to April, cases recorded in the city from March to June, and changes in those in New York …

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