Nucleic acid testing just a couple of scrapes on the tongue may affect the test results and lead to less accurate results.
Nucleic acid testing is done by taking secretions from the nasal palate in the nasal passages or from the lateral walls of the pharynx bilaterally, the tonsillar crypts, and the posterior pharyngeal wall. If the nucleic acid test is not sampled properly, if the swab is only scraped twice on the tongue or if it is not deep enough, the test results will be biased and less accurate.
During the nucleic acid test, it is important to cooperate with the medical staff and open the mouth as wide as possible to avoid touching the tongue, saliva or oral mucosa when the medical staff removes the swab, which may affect the test results.
During the nucleic acid test, you should strictly abide by the relevant epidemic prevention regulations, leave immediately after the test, minimize going out when not necessary, and take proper protective measures.