Nucleic acid testing is not recommended within 48 hours of the third dose of Neocoronavirus vaccine to avoid false positives. False-positive results may occur if nucleic acid testing is performed within 48 hours of vaccination; this is because PCR (polymerase chain reaction) testing is highly sensitive and may result in a positive nucleic acid test result if the patient receives the sample before the nucleic acid fragments of the NeoCoronavirus vaccine have been degraded. Therefore, it is generally recommended that a minimum of 48 hours should elapse between vaccination and nucleic acid testing; if same-day testing is necessary, it is recommended that prior consultation with the relevant authorities is necessary. In addition, there are certain contraindications to the administration of the new crown vaccine, so you need to go to a regular hospital or CDC to find out before receiving the vaccination.