You may collect your sample using either method, however collecting an anterior nasal swab only requires you to insert the swab 0.5 inches (1-2cm) into the nostril making it a simpler method of collection and leading to less discomfort that the nasopharyngeal collection. Both the nasopharyngeal and anterior nasal swab collection methods are capable of being used for rapid antigen testing to detect the SARS-CoV-2 nucleoprotein.