ECOv adopts biodegradable paper to replace plastic, and integrates the test stick, extract and test paper into one, which simplifies the whole cumbrous inspection process and reduces usage errors. It alleviates the problems of inconvenient use and the carbon emission caused by plastic packaging. It's designed with the timing-reaction paper strip and distribution of positive and negative, so that the users read the results in the accurate time. The stick indicates the depth of nose needed by children and adults, so that the users take the specimen and increase the accuracy of screening.