How deep do I need to go in my nostril to collect the sample? May 25, 2021 13:01 Updated You only need to swab the edge of your nostril. Do not insert the swab too deep. You can view our sample collection video here. Related articles How long is my sample stable for testing? How long does it take to get COVID-19 test results back? Is it safe to send my sample in the mail? What happens if I don’t collect my sample correctly? What is the price of the COVID-19 test?