Antigen vs Antibody Test for Covid-19
In this article we shall get to know about Covid-19 tests and their differences, i.e Antigen vs Antibody test for Covid-19. There are three types of tests for detecting Covid-19, RT-PCR, Antigen, and Antibody testing. To put it simply, PCR tests and Antigen tests detect if you are currently infected by the Virus, whereas Antibody tests detect if you have ever been infected by the virus in the past.
What is the use of the test?
Antigens are substances injected into your blood to trigger your body to fight them. They look for the presence of proteins that make up the SARS Cov-2 virus and detect if the person has an active infection.
Antibodies are generated in our body during infection of various diseases and they persist in our body for a long time. This use of this test is to determine if there was a past infection.
How is the Test performed?
A nasal or throat swab is taken by a trained nurse. The test is either sent to the lab for testing or the result will be obtained within a few minutes.
In Antigen Testing blood samples are taken and sent to a lab for testing.
What is the result of the test results?
Positive: A positive antigen test means that the person has is currently positive for covid-19 and has an active infection
Negative- A negative test means that the virus was not detected. But it does not mean that the person is not infected entirely. If there is any concern or symptoms then the person should be tested again using the RT-PCR test.
Positive- A positive result states that the person was infected in the past with Covid-19 and the immune system had created antibodies to fight it in the future.
Negative- A negative antibody test means that the person may not have actually had Covid-19 in the past or it was not detected as the test was taken too soon and the person might be still infected.
What are the advantages of this testing?
What are the disadvantages of this testing?