Nucleic acid testing is generally required immediately after exposure to a carrier of the new coronavirus to prevent infection.
Nucleic acid test should be done immediately after contact with the new coronavirus to avoid infection. If the result is negative after a nucleic acid test, another nucleic acid test should be done after a one-day interval, the new coronavirus has a certain incubation period, and it should be done once after a three-day interval, and then after a seven-day interval, another nucleic acid test should be done.
Nucleic acid test is now used as the initial basis for confirming the diagnosis of novel coronavirus infection. When the body is infected with the novel coronavirus, it will first multiply in the respiratory system. The specimens for nucleic acid test include nasal swabs, pharyngeal swabs and sputum, etc. The specimens are then subjected to the nucleic acid test for the virus to determine whether or not they are infected with the novel coronavirus.
If the nucleic acid test is positive, it indicates infection with the novel coronavirus.