Antibody testing looks for evidence that a person has been infected with the coronavirus SARS-CoV-2, but not the virus itself. James Martin / CNET For the most up-to-date news and information about the coronavirus pandemic, visit the WHO website .
As some areas of the country begin to ease social restrictions put in place in response to the coronavirus pandemic
, antibody tests are being championed as a crucial step toward the end of social distancing and the reopening of the economy while
we wait for a vaccine . And when there’s talk of antibody tests, you might also hear something about “antigen testing” and “serology,” each inspiring hope for a swift return to normalcy . Add blood tests, nose swab tests , drive-through testing sites and at-home test kits to the conversation, and suddenly which tests reveal what and what the results even mean are all a complete blur. Antibody tests have garnered attention lately because they’re designed to show if you’ve ever had COVID –
Keep track of the coronavirus pandemic.
But the question of what antibody tests can and can’t do, if they’re even reliable enough to tell us anything useful, and where and how you can take the tests are causing much confusion and debate. Here’s what we know (and don’t know) so far.
One more note: This article is intended to be a resource to help you understand current coronavirus testing as presented by organizations such as the US Food and Drug Administration and Centers for Disease Control and Prevention. It isn’t intended to serve as medical advice. If you’re seeking more information about coronavirus testing, Here’s how to find a testing site you (here’s another way for Apple Maps users). Here’s how to know if you qualify for a test and why there aren’t any coronavirus at-home test kits yet. This story is updated frequently as new information comes to light. What is antibody testing for coronavirus?
An antibody test is a type of medical test that could help doctors determine if you have ever been infected with the coronavirus, regardless of whether or not you ever felt sick. This is important because many who contract the disease
are asymptomatic .
Antibody testing does not, however, reveal whether you are (currently) infected with the virus, nor does it indicate whether you have recovered from it if you did have it. The test only shows whether or not at some point you had the virus – nothing more, nothing less.
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yet to be able to say for sure whether you’ll be immune, the hope is that people who have recovered from the disease won’t be able to catch it again, or, for that matter, infect others.
If that turns out to be the case, once a high enough percentage of the population has developed immunity to the coronavirus, a form of indirect protection called “ herd immunity “might shield those who haven’t been exposed yet from getting the disease – and help usher in an end to the pandemic.
Can antibody tests tell if you’re immune to coronavirus? With
other diseases caused by coronaviruses – like SARS and MERS – a positive antibody test usually indicates some degree of immunity. However, the (World Health Organization has warned that scientists don’t know enough yet about this new coronavirus – which is technically called SARS-CoV-2 – to be able to say one way or the other. They’re working on figuring it out.
– (e2-9d) – 10 (fe8a) b0 “,” firstName “:” Bridget “,” lastName “:” Carey “},” primaryColle ction “: {” id “:” (fa0bc-bf) – (dc-ac3d-ee) (a9fc) “,” title “:” CNET News Video “},” image “: {” path “:” https: // // cnet4.cbsistatic.com / img / sazxbiFplUWb1w AV-Ko1PPuqs= / (x) / / / 13 / 25 / / (f2ec – – 4d9e-a1bc-b (acbf) f3 /bridget-contacttracing.jpg “},” thumbnail “:” https: / /cnet3.cbsistatic.com / img / JfzOYWTE7gMUGc4hlJKUGDXncn0= / (x) / / 04691 / / / / 25 / (f2ec – – 4d9e-a1bc-b (acbf) f3 / bridget- contacttracing.jpg “,” closedCaptionPath “:” / videos / captions / webvtt /contact-tracing-explained-how-apps-can-slow-the-coronavirus.vtt “,” urlPath “:” / videos / contact-tracing-explained-how-apps-can-slow-the-coronavirus / “,” isVertical “: false,” m3u8 “:” https: / / cnetvideo.cbsistatic.com / vr / 4664 / / 25 / / / __ hls /master.m3u8 “,” mp4 “:” https: // // cnetvideo. cbsistatic.com / vr / / / 15 / / / / (n0) _ ContactTracingExplainer_Final _ (_) .mp4 “,” index “: 0}]”> Now playing: Watch this: Contact tracing explained: How apps can slow the coronavirus Antibody testing looks for proteins in the blood, called antibodies, which are left over after your body fights off a disease. When your immune system detects a new infection, your body starts producing antibodies, which it then trains to fight that specific invader. These antibodies figure out the invader’s weaknesses, then neutralize, destroy and ultimately remove it from your body. After it’s gone, your body continues producing antibodies in case it ever comes back. That’s what the coronavirus antibody tests look for – the leftover antibodies your immune system produced to fight the coronavirus. Where can I get a coronavirus antibody test? ) For now, you’ll have to start by talking to your doctor or another health care practitioner who is licensed to order lab tests. Guidelines vary by provider and by state, but generally you have to have been asymptomatic for one to two weeks (including the day of the test). Up until this week, antibody tests have not been widely available in the US, so health care professionals and first responders have been given priority. But starting April , you can get an FDA-authorized coronavirus antibody test at LabCorp facilities or Doctors’ offices and health care facilities staffed with a LabCorp technician (there are thousands nationwide). Right now , only the LabCorp test and three other antibody test kits have been Now playing: Watch this: How this drone can help stop the spread of coronavirus An antigen is a substance that usually comes from your environment and makes you sick when it gets inside your body. Common antigens include Antigens can get into your system much the same way you bring the substances you need to survive into your body. You can inhale airborne antigens into your lungs when you breathe, for example. Or you can bring antigens into your mouth when you, say, pick up an infectious substance like the coronavirus off a surface with your hands, then touch your face. Antigens can also get into your body through your ears, eyes and nose. Rarely, but sometimes, you can absorb them through your skin. Conversely, an antibody test only shows whether or not you’ve had the disease in the past. It can take up to two weeks for antibodies to be detectable in your blood – usually long after the virus has been defeated and an antigen test would come back negative. Now playing: Watch this: New ventilator gets us ready for a second or third wave … Serology refers to the study of blood serum, and the vast majority of serology testing is done to detect antibodies. Other body fluids, like saliva, can be tested too, but that’s because they contain trace elements of blood, which is what’s actually being tested. Serology tests can also determine blood type when donating blood or receiving a transfusion. They can be used to measure the levels of pharmaceuticals present in the bloodstream, during a drug trial, for example. But most of the time, when experts use the phrase “serology” or “serology testing,” they’re talking about antibody tests. Although increased antibody testing may help hasten the end of lockdown, it’s not the only thing that can speed the return to normalcy. Here’s a look at what needs to happen How is antigen testing different from antibody testing? An antigen test looks to see if you currently have the disease by searching for genetic information unique to a particular virus or bacterium. It tells doctors whether you are currently infected or not, but not if you were infected in the past and have since recovered.
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