Neocoronavirus Nucleic Acid Test (NNAT) cannot be performed within 48 hours of vaccination, while other vaccines can be tested for Neocoronavirus Nucleic Acid Test (NNAT). If the vaccine is the New Crown Vaccine, it is not possible to do the New Crown Virus Nucleic Acid Test within 48 hours, because the vaccine contains inactivated or recombinant New Crown Virus, and the current New Crown Virus Nucleic Acid Test is very sensitive to the New Crown Virus, so the New Crown Virus Nucleic Acid Test within a short period of time may show false positive results, which will affect the normal life of the vaccinee. However, if other vaccines, such as rabies vaccine, are used, it is very unlikely that false-positive results will occur, and therefore the test can be performed normally after vaccination. If there is any adverse reaction such as nausea or vomiting, it is not recommended to perform the test immediately, but to wait until the symptoms are under control.