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Re: Antibody test
[Re: tpcook]
#258738
06/19/2021 02:17 PM
06/19/2021 02:17 PM
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Joined: Aug 2000
Posts: 11,585
Eric_Hill
Traveler
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Traveler
Joined: Aug 2000
Posts: 11,585
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From the FDA: "At this time, researchers do not know whether the presence of antibodies means that you are immune to COVID-19; or if you are immune, how long it will last.
In people who have received a COVID-19 vaccination, antibody testing is not recommended to determine whether you are immune or protected from COVID-19. and more:
Q: Are antibody tests used to diagnose COVID-19? A: No. An antibody test does not detect the presence of the SARS-CoV-2 virus to diagnose COVID-19. These tests can return a negative test result even in infected patients (for example, if antibodies have not yet developed in response to the virus) or may generate false positive results (for example, if antibodies to another coronavirus type are detected), so they should not be used to evaluate if you are currently infected or contagious (ability to infect other people).
Q: If antibody tests cannot be used to diagnose COVID-19, what tests are available for that? A: Currently, there are two types of diagnostic tests for COVID-19:
Molecular (RT-PCR) tests, which detect the virus' genetic material Antigen tests that detect specific proteins on the surface of the virus Molecular and antigen tests can detect if you have an active coronavirus infection. If you test positive on either type of test, you should follow the CDC's guidelines to protect yourself and others.
Molecular and antigen tests are performed using samples taken mostly from the nose and throat using a long swab, or other respiratory specimens. For more information on the different types of tests, see:
Coronavirus Testing Basics CDC: Testing for COVID-19 Understanding Antibody Test Results Q: What does a positive antibody test mean? A: If you have a positive test result on a SARS-CoV-2 antibody test, it is possible that you have recently or previously had COVID-19. There is also a chance that the positive result is wrong, known as a false positive. False positive tests may occur:
Because antibody tests may detect coronaviruses other than SARS-CoV-2, such as those that cause the common cold. When testing is done in a population without many cases of COVID-19 infections. These types of tests work best in populations with higher rates of infection. Q: Does a positive antibody test mean that I am immune to COVID-19? A: A positive antibody test does not necessarily mean you are immune from SARS-CoV-2 infection, as it is not known whether having antibodies to SARS-CoV-2 will protect you from getting infected again. It also does not indicate whether you can infect other people with SARS-CoV-2.
Q: What does a negative antibody test mean? A: A negative result on a SARS-CoV-2 antibody test means antibodies to the virus were not detected in your sample. It could mean:
You have not been infected with COVID-19 previously. You had COVID-19 in the past but you did not develop or have not yet developed detectable antibodies. It is unknown if all infected individuals will develop a detectable antibody response. The result may be wrong, known as a false negative. This occurs when the test does not detect antibodies even though you may have specific antibodies for SARS-CoV-2."
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Re: Antibody test
[Re: louismcc]
#258741
06/19/2021 02:55 PM
06/19/2021 02:55 PM
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Joined: Sep 2010
Posts: 5,720 Massachusetts
maytrix
Traveler
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Traveler
Joined: Sep 2010
Posts: 5,720
Massachusetts
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I think you were a little harsh to tpcook, maybe there were other anti-vax posts or something, but his statement was what I was thinking as well. It is inaccurate, but posting something inaccurate doesn't mean someone is lying or anti-vax. Here's a better article about it. In short, lack of anti-bodies does not mean you aren't protected, the instructions to fight off the virus are still there. As I understand it, anti-bodies would be created again if exposed to the virus. https://www.pbs.org/newshour/health/covid-antibody-test-after-vaccine
Matt
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Re: (NA) Re: Antibody test
[Re: Eric_Hill]
#258782
06/20/2021 08:39 AM
06/20/2021 08:39 AM
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Joined: Oct 2000
Posts: 4,266 Vero Beach, Fl and South Sound...
tpcook
Traveler
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Traveler
Joined: Oct 2000
Posts: 4,266
Vero Beach, Fl and South Sound...
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I resent the way you posted your remark. I am not an expert on antibodies and expressed my thoughts that the vaccine would produce antibodies.. For you to go off on me is inexcusable and thoughtless. I expect an apology from you.!
I expect to use an antibody test for entrance back in the USVI for travel back to USA . I received the 2 doses of vaccine months ago., so hardly an antivaxer.
Last edited by tpcook; 06/20/2021 08:42 AM.
tpcook
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Re: (NA) Re: Antibody test
[Re: jagmansr]
#258783
06/20/2021 08:43 AM
06/20/2021 08:43 AM
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Joined: Jan 2017
Posts: 735 Panama City Beach, Florida
xrayman67
Traveler
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Traveler
Joined: Jan 2017
Posts: 735
Panama City Beach, Florida
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It is my understandings (and I will confirm this before my trip in a couple weeks,) that if you depart BVI by water (ferry), a positive antibody test is all that needed for entry into St Thomas and not a PCR Test. If flying back into the U.S., then the PCR or atigen test are required. We used positive antibody test to return to USVI from BVI via ferry in May. The antibody test is not useless.
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Re: (NA) Re: Antibody test
[Re: tpcook]
#258801
06/20/2021 12:11 PM
06/20/2021 12:11 PM
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Joined: Jul 2020
Posts: 520 Bay Area
Husker
Traveler
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Traveler
Joined: Jul 2020
Posts: 520
Bay Area
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I resent the way you posted your remark. I am not an expert on antibodies and expressed my thoughts that the vaccine would produce antibodies.. For you to go off on me is inexcusable and thoughtless. I expect an apology from you.!
I expect to use an antibody test for entrance back in the USVI for travel back to USA . I received the 2 doses of vaccine months ago., so hardly an antivaxer. You deserve an apology, tpcook. Eric is out of line and needs to chill out.
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Re: (NA) Re: Antibody test
[Re: Husker]
#258809
06/20/2021 01:30 PM
06/20/2021 01:30 PM
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Joined: Aug 2000
Posts: 82,482 Central Florida!
Carol_Hill
Traveler
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Traveler
Joined: Aug 2000
Posts: 82,482
Central Florida!
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The posts have been edited. Sorry things went south. Will close this one and if someone wants to start another thread with this topic, go ahead.
Carol Hill
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