Nucleic acid testing should not be done until 48 hours after vaccination. This is because nucleic acid fragments of the virus may remain in the body for 48 hours after vaccination, and nucleic acid testing at this time may lead to inaccurate results and false positives. If the vaccine was given on the same day, the nucleic acid test can only be done 48 hours after the vaccine was given. This is because the vaccine is administered by injecting a specially treated virus into the body so that the body can develop antibodies against it. If the nucleic acid fragments of the virus have not disappeared after vaccination, the nucleic acid test results may be inaccurate. Meanwhile, before conducting the nucleic acid test, you should pay attention to the fact that you should not smoke, drink alcohol, chew gum, etc. 30 minutes before sampling, and wear a mask throughout the process, . Keep a distance of more than 1 meter from other people and follow the guidelines of site staff.