Thanksgiving get-together? Virus spread possible even after testing negative – Nashville-Davidson, Tennessee

Nashville-Davidson, Tennessee 2020-11-19 04:53:34 –

(NEXSTAR) — As the family plans Thanksgiving, public health officials warn against direct gatherings, even if the coronavirus test is negative.

“The effects of the coronavirus vary from person to person. Some people have no symptoms at all when they infect others and don’t even know they are ill,” said Lisa Malagakiss, senior director of infection prevention at John Hopkins. The doctor says.

According to the Centers for Disease Control and Prevention, it is important to remember that if you get a negative COVID-19 result, “the test result only means that you did not have COVID-19 at the time of the test.”

According to the CDC, your body usually produces antibodies 1-3 weeks after infection, so it can take several days for a new infection to appear on the test.

“If you’ve been exposed to the virus recently, you can still get sick,” the CDC said. “This means that the virus can still spread.”

According to a study by the medical journal Annals of Internal Medicine, there was a 100% chance of getting a false-negative test result on the first day of the four days of asymptomatic infection.

Studies have shown that the average false-negative rate dropped to 38% when symptoms began. Three days after the onset of symptoms, the false-negative rate dropped to 20%.

What is the difference between the tests?

There are two types of COVID-19 tests: viruses and antibodies.

A virus test detects the current infection, but an antibody test can show if a person has been infected in the past.

For viral or diagnostic tests, use liquid from a cotton swab or saliva in the nose or throat. If symptoms appear after a negative virus test, another test may be needed to determine if you are infected.

Antibody tests performed on blood samples determine if the antibody has developed against the virus. According to Johns Hopkins, it takes 12 days after exposure for sufficient antibodies to appear in the test. Moreover, it is not yet clear whether the antibody is immune.

“Unless virus testing is delayed, antibody testing should not be used to diagnose current COVID-19 infections,” the CDC said.

Coronavirus test results can take hours to up to a week, depending on where you are testing.

So how dangerous is it to get together in person?

“It’s really dangerous,” Alex Huffman, a professor at the University of Denver, told KDVR.

Huffman, an associate professor of chemistry and biochemistry and an aerosol scientist, has been studying viruses in the air. In July, he adopted a widely used model to analyze the risk of COVID-19 infection.

Huffman is a medium-sized dining room where 10 people sit for a Thanksgiving meal for two hours, and if one becomes infected, the other cannot wear it, so he is newly infected and returns home. I found that the chances are about 60% to 80% masks when eating and drinking.

“When you speak, you have a large spray of large droplets coming out and a large plume of small particles coming out. The small ones stay hanging in the room for a long time,” Huffman says. I added that keeping a distance helps, but it doesn’t do much.

As the pandemic worsens, the CDC states that “small household gatherings are a key factor in the increase in COVID-19 cases.”

However, the CDC has not completely eliminated small gatherings, saying that celebrating with families who are consistently taking steps to reduce infection has the lowest risk of spreading the virus. I will.

And, of course, celebrating in effect is a surefire way to stop the spread.

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