Should I Get an RT-PCR Test if My Antigen Test is Positive for COVID-19?

When you receive a positive result from an antigen test for COVID-19, it is often recommended to follow up with an RT-PCR (reverse transcription polymerase chain reaction) test. Antigen tests can sometimes produce false positives, so confirming the result with a more sensitive RT-PCR test is a good practice. Here, we will discuss the reasons for this recommendation and provide guidance based on different scenarios.

General Recommendations

While no RT-PCR test is strictly required just because your antigen test is positive, confirming the result with a RT-PCR test is highly advisable. This is especially true if you:

Have symptoms of COVID-19 Have been in close contact with someone who tested positive for the virus

Antigen tests are quick and convenient, but they have limitations. They can sometimes produce false positives, which is why a more accurate RT-PCR test is often recommended to confirm the presence of the virus.

Medical Advice

From a medical standpoint, you may not need an RT-PCR test if you have no symptoms of viral infection. However, this is highly dependent on the specific circumstances of your situation. If you:

Experience symptoms like fever, cough, or difficulty breathing Have had recent travel to a high-risk area Were in close contact with someone who tested positive for COVID-19

In many cases, it is advisable to err on the side of caution and get a RT-PCR test to avoid misdiagnosis and ensure accurate treatment.

Government Regulations

Government regulations can also play a significant role in this decision. Some local health guidelines may require RT-PCR testing even if your antigen test is positive. It is therefore important to consult your healthcare provider or local health department for specific local recommendations.

Understanding Antigen and Antibody Tests

Antigen tests are rapid diagnostic tests that look for viral proteins in your respiratory secretions. On the other hand, RT-PCR tests amplify and detect the viral RNA, providing a more accurate result. Antibody tests, on the other hand, measure the presence of antibodies in your blood, which can indicate a past infection.

If you have a positive antibody test, it means that you had a past infection with the virus. However, this does not necessarily mean that you are still infectious. Antibodies remain in your body for a prolonged period after you have recovered from the infection.

Conclusion

While an RT-PCR test is not always required immediately after a positive antigen test, it is often recommended for accuracy and to rule out false positives. Additionally, government regulations can influence this decision. Always consult with a healthcare provider or local health department for the most accurate and up-to-date guidance based on your specific situation.