Unless you undergo testing, you’ll never know if you have COVID-19 or another condition, such as the common cold or flu. After all, most of their symptoms are the same save for difficulty breathing. If you don’t undergo testing, then you need to isolate yourself; you can’t work with others, and you certainly cannot travel. On top of that, you may also experience anxiety over the possibility of having a severe case of COVID-19 and infecting the people you spent time with. These reasons are why many are eager to purchase a rapid antigen test kit.