A new study on Duke University’s coronavirus testing and surveillance strategy highlights the importance of widespread testing of asymptomatic individuals to prevent transmission and provides support for the feasibility of a pooled testing approach, in which multiple samples are combined in a single test.
New research has found that people with a SARS-CoV-2 infection who are asymptomatic carry just as much virus in their throats, lungs, and noses as those who have symptoms. Some experts believe that asymptomatic people have caused the virus to spread more readily in communities.
Scientists are studying a phenomenon called "disease tolerance." Understanding it in humans, if it exists, could revolutionize medicine. According to various estimates between 20 and 45 percent of people who get Covid-19, and possibly more – sail through the infection without realizing they had it.
The number of people infected with the coronavirus in different parts of the United States was anywhere from two to 13 times higher than the reported rates for those regions. The findings suggest that large numbers of people who did not have symptoms or did not seek medical care may have kept the virus circulating in their communities.
A new analysis from Scripps Research found 30-40% of people with coronavirus are asymptomatic, but that factor doesn’t mean they are immune from impacts of the disease. Research suggests patients who don’t show any symptoms may still suffer internal organ damage, including lung abnormalities.
The World Health Organization clarified its comments that asymptomatic spread is “very rare” after coming under fire by academics and epidemiologists for misleading the public. While more transmission does happen among symptomatic individuals, a risk of transmission is present for all, an official explained.
A third of Covid-19 patients are asymptomatic and 0.4% of those who get sick will die, CDC says. The agency cautions that those numbers are subject to change as more is learned about Covid-19, and it warns that the information is intended for planning purposes.
In order to get infected you need to get exposed to an infectious dose of the virus; based on infectious dose studies with other coronaviruses, it appears that only small doses may be needed for infection to take hold. Learn where and how your risks increase.