Nucleic acid testing is at your own expense.
Nucleic acid detection is a method to judge whether a patient is infected by virus by finding out whether there is DNA and RNA of invasive virus in respiratory tract samples, blood or feces of the patient, and it is the gold standard for diagnosing novel coronavirus infection. After COVID-19 infects the human body, it will first reproduce in the respiratory system, so we can judge whether the human body is infected with the virus by detecting the virus nucleic acid in sputum and nasopharyngeal swab.