At-home COVID-19 test kits, specifically rapid antigen tests, offer a convenient way to detect an active SARS-CoV-2 infection. These tests provide quick results, typically within minutes, helping individuals make informed health decisions and prevent further spread of the virus. Understanding how to properly use these kits is important for accurate results and effective health management.
Getting Ready for Testing
Before beginning the test, prepare your testing area and kit components. Find a clean, flat surface to lay out all materials. Check the expiration date on the test kit; expired tests may yield inaccurate results. Many tests have had their expiration dates extended, so check the manufacturer’s or FDA’s website for updated information if unsure.
Wash hands thoroughly with soap and water or use hand sanitizer, ensuring they are dry before handling components. Open the kit and confirm all parts (e.g., extraction tube, swab, test cassette) are present and undamaged. Read your kit’s specific instructions, as procedures vary between brands.
Performing the Test Steps
The testing process involves precise steps for accurate sample collection and analysis. Open the sealed pouches and place the test device on your clean, flat surface. Prepare the extraction tube by twisting off its top or peeling off the seal, preventing spills.
Collect the nasal sample using the sterile swab. Gently insert the swab into one nostril (about ¾ inch deep or until resistance, without pain). Rotate the swab firmly against the inside walls at least five times for about 15 seconds. Repeat in the second nostril with the same swab.
After collection, immediately insert the swab into the extraction tube, ensuring the tip is submerged. Swirl vigorously, pressing it against the tube’s bottom and sides (5-10 times) to transfer the sample. As you remove the swab, pinch the tube sides to squeeze out remaining liquid, then discard the swab. Cap the extraction tube securely.
Hold the extraction tube upright and squeeze the specified drops (usually 3-4) onto the test cassette’s sample well. Set a timer for the exact duration (typically 10-30 minutes) indicated in your kit’s instructions. Do not read the result before or after this window, as it can lead to inaccurate outcomes.
Understanding Your Results and Next Steps
After the waiting period, interpret results by examining lines on the test cassette. A positive result shows two colored lines: one at the control line (C) and another at the test line (T), even if faint. This indicates SARS-CoV-2 antigens were detected, suggesting a likely active infection. If positive, isolate from others, inform close contacts, and contact a healthcare provider for guidance. Follow local public health guidelines for isolation duration and return to activity.
A negative result shows a single line at the control line (C) and no line at the test line (T). While this indicates the test did not detect the virus, it doesn’t completely rule out infection, especially if tested early or without symptoms. If symptomatic, retest 48 hours after the first negative result. If asymptomatic, retest 48 hours after the first negative test, and again 48 hours after the second. Continue monitoring for symptoms and retest if new symptoms develop or exposure is suspected.
An invalid result occurs if no line appears at the control line (C), or only a line at the test line (T) without a control line. This means the test didn’t function properly, possibly due to user error, faulty components, or improper storage. If invalid, discard the kit and perform a new test, carefully following instructions. If symptoms persist, consult a healthcare professional, who may recommend a laboratory PCR test for higher sensitivity.