If the third injection refers to the new coronavirus vaccine, it is recommended that nucleic acid testing should be done only after 48 hours. If other types of vaccines are administered, nucleic acid testing can be done at any time.
The new coronavirus vaccine contains nucleic acid fragments of the new coronavirus. In the vaccination site, during the process of extracting the vaccine liquid with a syringe and the exhausting of the syringe, the vaccine may be present in the air in the form of liquid or aerosol, and there is a chance of contamination of the vaccinated person and other persons in the vaccination site, and a false positive nucleic acid test may occur at this time.
In order to ensure the accuracy of the nucleic acid test results, it is recommended that the nucleic acid test should not be done within 48 hours after vaccination with the XKV vaccine, but for other vaccines, there is no need to have this concern and the nucleic acid test can be done at any time.