Nasal swab covid-19 self test rapid antigen test is intended as an aid in the diagnosis of coronavirus infection disease (COVID-19) for symptomatic patients within 7 days after onset of symptoms, which is caused by 2019-nCoV. According to usability study on laymen use, the test can be correctly performed for anyone age over 18. However, nasal swab specimen from individuals aged below 18 years old should be collected and performed by another adult. While the users age over 75 should be aware of the removal of their nasal swab or have nasal swabs assist.