PCR or antigen test


We are constantly developing more effective ways to detect whether we have COVID-19. Antigen and PCR tests are the best methods to determine if you have COVID-19. But are you aware of the differences? We’ll answer all your questions in today’s post.

PCR Test

The simple test that detects whether we have been infected with the COVID-19 virus is the one we’ve all heard about since the outbreak. The enzymes in the test kit copy the RNA into DNA. This allows for virus detection using a machine called PCR. It cycles the temperature to make approximately 35 billion copies of each viral RNA strand.

Fluorescent markers can be used to bind to amplified DNA. The light produced by fluorescent markers can then be read by the machine for the day 2 and 8 test result. A positive test is one where the intensity of light within the sample exceeds a threshold.

The procedure involves taking a sample of the pharynx and using a thin cotton bud to access the nasal passages. The results of the antigen test are not known until several hours after the sample was taken. This test is also the most reliable and sensitive.

Because it can detect if you have COVID-19, the PCR test is a highly reliable and popular test for traveling.

Antigen test

Antigen – A structure that is recognized as foreign by the body, an antigen triggers the immune system’s production of self defense systems to eliminate pathogens from blood or tissues. White blood cells and antibodies are key to antigen clearance. Antigen tests can be very useful when you need to determine which individuals are at the highest risk of infection.

Antigen tests are a method that detects antigens. This is a protein found on the virus’ surface. It is extracted via the nose in the same manner as PCR tests. The main difference is the speed of the results, which are usually available within 15-20 minutes.

One of the major differences between the tests is their sensitivity. The antigen test has a lower percentage of sensitivity than the PCR test and therefore lower reliability.

When is the best time to take each test?

It is essential to be familiar with the requirements of the destination before you travel. The local government or city will request a PCR test or antigen test.

At least one week before your departure, check the COVID-19 requirements with your airline and your destination government.

Where can I get the antigen or PCR test?

There are many options for COVID-19 testing at the moment.

You can have the PCR (antigen) test done in your airport at the Travel COVID-19 Testing Centres if you are from Madrid, Malaga, or Seville. You can also take the test in a private medical center if you are from another city.

The home PCR test, which can be done on the mainland, is another option. It is more convenient and quicker to obtain your travel-ready PCR test. Alianza COVID-19 provides solutions for PCR and antibody tests. This allows you to avoid taking your entire family to a lab or clinic.