Antibody Testing Is Not Currently Recommended to Assess Immunity After COVID-19 Vaccination

The U.S. Food and Drug Administration (FDA) is reminding the public and health care providers that results from currently authorized SARS-CoV-2 antibody tests should not be used to evaluate a person’s level of immunity or protection from COVID-19 at any time, and especially after the person received a COVID-19 vaccination.

While a positive antibody test result can be used to help identify people who may have had a prior SARS-CoV-2 infection, more research is needed in people who have received a COVID-19 vaccination. Currently authorized SARS-CoV-2 antibody tests have not been evaluated to assess the level of protection provided by an immune response to COVID-19 vaccination. If antibody test results are interpreted incorrectly, there is a potential risk that people may take fewer precautions against SARS-CoV-2 exposure. Taking fewer steps to protect against SARS-CoV-2 can increase their risk of SARS-CoV-2 infection and may result in the increased spread of SARS-CoV-2.

The FDA is providing additional information and recommendations to the public and health care providers about the use of antibody tests in people who received a COVID-19 vaccination.

abfind post vaccination neutralizing antibody test
abfind post vaccination neutralizing antibody test

Recommendations for People Who Had or May Have a SARS-CoV-2 Antibody Test

  • Be aware that SARS-CoV-2 antibody tests help health care providers identify whether someone has antibodies to SARS-CoV-2, the virus that causes COVID-19, indicating a prior infection with the virus. However, more research is needed to understand the meaning of a positive or negative antibody test, beyond the presence or absence of antibodies, including in people who received a COVID-19 vaccination, in people who have been exposed and have SARS-CoV-2 antibodies, and in people who are not fully vaccinated.
  • If you have not been vaccinated: Be aware that a positive result from an antibody test does not mean you have a specific amount of immunity or protection from SARS-CoV-2 infection. If you have a positive test result on a SARS-CoV-2 antibody test, it means that it is possible you were previously infected with the SARS-CoV-2 virus. Talk with your health care provider about the meaning of your SARS-CoV-2 antibody test results.
  • If you received a COVID-19 vaccination: Continue to follow the CDC’s recommendations for fully vaccinated people. Be aware that if you have a positive test result on a SARS-CoV-2 antibody test, it is possible you were previously infected with SARS-CoV-2. A COVID-19 vaccination may also cause a positive antibody test result for some but not all antibody tests. You should not interpret the results of your SARS-CoV-2 antibody test as an indication of a specific level of immunity or protection from SARS-CoV-2 infection. Talk to your health care provider or your state and local health departments if you have questions about whether an antibody test is right for you.

Recommendations for Health Care Providers

  • At this time, do not interpret the results of qualitative, semi-quantitative, or quantitative SARS-CoV-2 antibody tests as an indication of a specific level of immunity or protection from SARS-CoV-2 infection after the person has received a COVID-19 vaccination. While a positive antibody test can indicate an immune response has occurred (seroconversion), and failure to detect such a response may suggest a lack of immune response, more research is needed. Currently authorized SARS-CoV-2 antibody tests are not validated to evaluate specific immunity or protection from SARS-CoV-2 infection. SARS-CoV-2 antibody tests should be ordered only by health care providers who are familiar with the use and limitations of the test. For more information about antibody tests for SARS-CoV-2, see Serology/Antibody Tests: FAQs on Testing for SARS-CoV-2.
  • Be aware that vaccines trigger antibodies to specific viral protein targets. For example, currently authorized COVID-19 mRNA vaccines induce antibodies to the spike protein and not to nucleocapsid proteins that are likely detected only after natural infections. Therefore, COVID-19 vaccinated people who have not had previous natural infection will receive a negative antibody test result if the antibody test does not detect the antibodies induced by the COVID-19 vaccine. If you are considering antibody testing in vaccinated individuals, follow the Centers for Disease Control and Prevention’s guidelines for antibody testing. For more information about antibody test performance visit EUA Authorized Serology Test Performance.

 

 

Cytomegalovirus gB Late Neutralizing Antigen (CMV-LA gB Neutralizing) Antibody (FITC)

abx411284-01mg 0.1 mg
EUR 610.8

Monoclonal NGF/proNGF Neutralizing Antibody Antibody

AMM06679G 0.05mg
EUR 633.6
Description: A Monoclonal antibody against Human NGF/proNGF Neutralizing. The antibodies are raised in Mouse. This antibody is applicable in E

D/E NEUTRALIZING AGAR

D04-112-10kg 10 kg
EUR 1843.2

D/E NEUTRALIZING AGAR

D04-112-2Kg 2 Kg
EUR 447.6

D/E NEUTRALIZING AGAR

D04-112-500g 500 g
EUR 165.6

D/E NEUTRALIZING BROTH

D04-115-10kg 10 kg
EUR 1210.8

D/E NEUTRALIZING BROTH

D04-115-2kg 2kg
EUR 309.6

D/E NEUTRALIZING BROTH

D04-115-500g 500 g
EUR 128.4

Rabbit anti-LukAB pAb (neutralizing)

0313-001 500ug
EUR 486
Description:
  • Related to: Staphylococcus
  • Applications: Neutralization

Accu-Tell COVID-19 IgG/IgM Rapid Test

GEN-B352-20tests 20 tests
EUR 283.2
Description: A rapid test for detection of antibodies (IgG and IgM) for 2019-nCoV, the novel Coronavirus from the Wuhan strain. The test is easy to perform, takes 10 minutes to provide reliable results and is higly specific to the 2019-nCoV Coronavirus.

Accu-Tell COVID-19 IgG/IgM Rapid Test

GEN-B352-40tests 40 tests
EUR 385.2
Description: A rapid test for detection of antibodies (IgG and IgM) for 2019-nCoV, the novel Coronavirus from the Wuhan strain. The test is easy to perform, takes 10 minutes to provide reliable results and is higly specific to the 2019-nCoV Coronavirus.

Syphilis Antibody ELISA test

100 96T/Box Ask for price
Description: ELISA based test for quantitative detection of Syphilis Antibody

NOVATest IgG/IgM Antibody Rapid Test Kit (NOVA Test)

UNCOV-40 40 Tests
EUR 115

Test product

testtt 0 Ask for price

Classical Porcine Fever Virus Neutralizing Antibody ELISA Kit

RK04111 96T
EUR 625.2

HAV antibody IgM ELISA test

75 96T/Box Ask for price
Description: ELISA based test for quantitative detection of HAV antibody IgM

HEV antibody IgM ELISA test

92 96T/Box Ask for price
Description: ELISA based test for quantitative detection of HEV antibody IgM

Brucella Antibody Rapid Test Kit

abx092069-40tests 40 tests
EUR 427.2

Antibody ISOTYPING TEST KIT (OKSA11303)

OKSA11303 10 Tests
EUR 936
Description: Description of target: MOUSE MONOCLONAL ANTIBODY ISOTYPING TEST KIT;Species reactivity: Mouse;Application: IS;Assay info: ;Sensitivity:

DNASE TEST AGAR

D04-101-10kg 10 kg Ask for price

DNASE TEST AGAR

D04-101-2Kg 2 Kg Ask for price

DNASE TEST AGAR

D04-101-500g 500 g Ask for price

DERMATOPHYTE TEST AGAR

D04-107-10kg 10 kg
EUR 1018.8

DERMATOPHYTE TEST AGAR

D04-107-2Kg 2 Kg
EUR 268.8

DERMATOPHYTE TEST AGAR

D04-107-500g 500 g
EUR 116.4

MOTILITY TEST MEDIUM

M13-121-10kg 10 kg
EUR 1833.6

MOTILITY TEST MEDIUM

M13-121-2Kg 2 Kg
EUR 445.2

MOTILITY TEST MEDIUM

M13-121-500g 500 g
EUR 164.4

SNYDER TEST AGAR

S19-119-10kg 10 kg
EUR 1258.8

SNYDER TEST AGAR

S19-119-2Kg 2 Kg
EUR 320.4

SNYDER TEST AGAR

S19-119-500g 500 g
EUR 130.8

SAM Test Strip

TS00201s-30 30 tests
EUR 499.2
Description: S-adenosylmethionine quantitative test strip for serum, plasma and whole blood

SAH Test Strip

TS00301s-30 30 tests
EUR 604.8
Description: S-adenosylhomocysteine quantitative test strip for serum, plasma and whole blood

HCY Test Strip

TS00401s-30 30 tests
EUR 663.6
Description: Serum homocysteine quantitative test strip

aa test product

123 1MG
EUR 279.6

Leave a Comment