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Doctor explains accuracy, effectiveness of COVID-19 PCR, rapid tests
Kim Dacey
Reporter
Doctor explains accuracy, effectiveness of COVID-19 PCR, rapid tests
TESST ARE TOO LG.ON PEOPLE ARE LINING UP TO GET AT-HOME COVID TESTS. STORES CAN바카라 게임 웹사이트T KEEP THEM IN STOCK. MOST ARE RAPID ANTIGEN TESTS DIFFERENT THAN THE GOLD STANDARD PCR TEST >> THEY바카라 게임 웹사이트RE MUCH BETTER AT DETECTING YOU WHEN YOU ARE POTENTIALLY INFECTIOUS, MEANING YOU HAVE A LOT OF VIRUS PARTICULARLY IN YOUR NOSE, YOUR UPPER RESPIRATORY TRACT. KIM: DR. PEKOSZ SAYS PCRES TTS ARE MORE SENSITIVE AND CAN PKIC UP ON SMALLER PARTICLES OF THE VIRUS. SO IF YOU TEST NEGATIVE ON A HOME TEST, IT바카라 게임 웹사이트S NOT A GUARANTEE YOU바카라 게임 웹사이트RE NOT INFECTED, BUT YOU바카라 게임 웹사이트RE PROBABLY NOT CONTAGIS.OU >> IT PROBAB MLYEANS FOR THE NEXT SIX HOURS, SEVEN HOS UROR SO, YOU CERTAINLY WON바카라 게임 웹사이트T BE ABLE TO HAVE A HIGH LIKELIHOOD OF SPREADING THE INFECTIO KIM: SO, HE SAYS THEY바카라 게임 웹사이트RE GREAT TO USE BEFORE GOING TO AN EVENT OR FILAMY GATHERING. AND IF YOU THINK YOU MIG BHTE INFECTED, YOU CAN USE MULTIPLE RAPID TESTS OVER S AHORT PERIOD OF TIME TO CONFIRM. EACH BRAND OF TEST IS DIFFERTEN TO USE SO GETTING ACCUTERA RESULTS IS ABOUT TWO CRITICAL THGS IN >> ONE IS TO GET THE SAMPLE THE RIGHT WAY, SO YOU REALLY HAVTOE FOLLOW THE INSTRUCTIONS IN TERMS OF ARE YOU SWABBING YOUR NOSE OR YOUR THROAT, AND TO FOLLOW THE INSTRUCTIONS ON HOW YOU GET THE SWAB. AND THEN THE CRITICAL THG INIS WAITING LONG ENOUGH FOR THE STTE RESULT TO REALLY READ THROUGH TO THE LITTLE DEVICE YOU GET WITH THAT. KIM: AND IF YOU GET A POSITIVE RESULT ON A HOME TEST, IT바카라 게임 웹사이트S GOOD IDEA TO CONFIRM WITH A RPC AND REPORT IT TO YOUR DOCTOR. >> ONE OF THE THINGS WE DON바카라 게임 웹사이트T WANT IS A LOT OF PEOPLE TESTING POSITIVE AT HOME AND NOT REPORTING BACK TO PUBLIC HEALTH AUORTHITIES THAT THEY바카라 게임 웹사이트RE INFECTED BECAUSE THEN WE WON바카라 게임 웹사이트T GET AN ACCURATE COUNT OF HOW MANY PEOPLE ARE INFECTED AT ANY TIME. KIM: NOT ALL BRANDS OF AT-HOME TESTS ARE CREATED EQL.UA WE바카라 게임 웹사이트VE PLACED A LINK COMPARING SOME OF THEM ON OUR WEBSITE AND OUR MOBILE A
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Doctor explains accuracy, effectiveness of COVID-19 PCR, rapid tests
Kim Dacey
Reporter
As COVID-19 cases rise, there continues to be crushing demand for at-home rapid tests, but how accurate are they and how should they be used? The tests have skyrocketed in popularity this holiday season. A lot of people used them before gathering or because of long lines to get PCR tests.People are lining up to get at-home COVID-19 tests, stores can't keep them in stock. Most are rapid antigen tests, different than the gold standard PCR tests."They're much better at detecting you when you are potentially infectious, meaning you have a lot of virus, particularly in your nose, your upper respiratory tract," virologist Dr. Andrew Pekosz, of Johns Hopkins Bloomberg School of Public Health, said. Pekosz said PCR tests are more sensitive and can pick up on smaller particles of the virus, so if you test negative on a home test, it's not a guarantee you're not infected but you're probably not contagious."It probably means for the next six hours, seven hours or so, you certainly won't be able to have a high likelihood of spreading the infection," Pekosz said.So, he said they're great to use before going to an event or family gathering.And if you think you might be infected you can use multiple rapid tests over a short period of time to confirm. Each brand of test is different to use, so getting accurate results is about two critical things. "One is to get the sample the right way so you really have to follow the instructions in terms of are you swabbing your nose or your throat and to follow the instructions on how you get the swab, and then the critical thing is waiting long enough for the test result to really read through to the little device you get with that," the doctor said.And if you get a positive result on a home test, it's a good idea to confirm with a PCR and report it to your doctor."One of the things we don't want is a lot of people testing positive at home and not reporting back to public health authorities that they're infected because then we won't get an accurate count of how many people are infected at any time," Pekosz said.
BALTIMORE —

As COVID-19 cases rise, there continues to be crushing demand for at-home rapid tests, but how accurate are they and how should they be used?

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The tests have skyrocketed in popularity this holiday season. A lot of people used them before gathering or because of long lines to get PCR tests.

People are lining up to get at-home COVID-19 tests, stores can't keep them in stock. Most are rapid antigen tests, different than the gold standard PCR tests.

"They're much better at detecting you when you are potentially infectious, meaning you have a lot of virus, particularly in your nose, your upper respiratory tract," virologist Dr. Andrew Pekosz, of Johns Hopkins Bloomberg School of Public Health, said.

Pekosz said PCR tests are more sensitive and can pick up on smaller particles of the virus, so if you test negative on a home test, it's not a guarantee you're not infected but you're probably not contagious.

"It probably means for the next six hours, seven hours or so, you certainly won't be able to have a high likelihood of spreading the infection," Pekosz said.

So, he said they're great to use before going to an event or family gathering.

And if you think you might be infected you can use multiple rapid tests over a short period of time to confirm. Each brand of test is different to use, so getting accurate results is about two critical things.

"One is to get the sample the right way so you really have to follow the instructions in terms of are you swabbing your nose or your throat and to follow the instructions on how you get the swab, and then the critical thing is waiting long enough for the test result to really read through to the little device you get with that," the doctor said.

And if you get a positive result on a home test, it's a good idea to confirm with a PCR and report it to your doctor.

"One of the things we don't want is a lot of people testing positive at home and not reporting back to public health authorities that they're infected because then we won't get an accurate count of how many people are infected at any time," Pekosz said.