Function of Covid-19 Self Test Rapid Antigen Test

The COVID-19 self-test rapid antigen test is designed to detect the presence of specific proteins (antigens) from the SARS-CoV-2 virus in a person’s body, indicating whether they have an active infection. Here's how it functions:

1. **Detection of Active Infection**: The test targets the viral antigens found in the respiratory tract. It identifies individuals who are currently infected with COVID-19 by detecting the proteins from the virus.

2. **Speed and Convenience**: Unlike PCR tests that require lab processing, rapid antigen tests can provide results within 10–30 minutes, making them a practical tool for at-home testing.

3. **Ease of Use**: These self-tests come with simple instructions. Users typically collect a sample by swabbing the inside of their nose, then placing the swab in a solution that is tested for the virus.

4. **Early Diagnosis**: The rapid antigen test is most effective during the early stages of infection when the viral load is high, making it a useful tool for detecting COVID-19 quickly and helping to prevent its spread.

5. **Limitations**: While rapid antigen tests are fast and accessible, they are less sensitive than PCR tests, meaning they may miss infections, especially in people with low viral loads or those in later stages of the infection.

In summary, the COVID-19 self-test rapid antigen test helps individuals quickly determine if they are currently infected, enabling timely isolation and reducing the potential spread of the virus.