Swabs, or pharyngeal swabs, are hazardous after nucleic acid testing and are considered contaminated waste. Nucleic acid test, as one of the common testing methods to determine the presence of viral infections, has been widely used in clinical and life, the test method is usually the use of pharyngeal swabs on the pharyngeal secretions as well as nasal secretions to collect, and then use chemical reagents for testing. When the pharyngeal swab is used, its head will be contaminated with the oral secretions or nasal secretions of the examinee, and if the examinee is infected with viruses, the viruses will also exist on the pharyngeal swab. Part of the virus can be transmitted through airborne or contact, if the throat swab is not properly handled, it may lead to the spread of pathogens, causing serious consequences, so the throat swab after doing nucleic acid is harmful. Throat swabs after use should be recycled as medical waste and centrally destroyed to ensure safety.