False positives may occur in some cases immediately after vaccination, but they usually go away within 48 hours, and nucleic acid testing is not recommended immediately after vaccination with the new coronavirus vaccine.
There are many types of vaccines, not all of which will result in a positive nucleic acid test for Neocoronavirus after vaccination. Vaccines such as adenovirus vector vaccines and recombinant subunit CHO vaccines do not usually result in a positive nucleic acid test.
However, inactivated vaccines have a certain probability of causing false positives when nucleic acid testing is performed immediately after vaccination. This is due to the fact that although the viruses in inactivated virus vaccines have lost their ability to cause infection and disease, they still retain relatively intact nucleic acid fragments. If nucleic acid testing is performed immediately after vaccination, the nucleic acid fragments in these vaccines may be captured, resulting in a false-positive test.
It is recommended that nucleic acid testing should be avoided within 48 hours of vaccination. A positive nucleic acid test within 48 hours of vaccination is highly suggestive of infection with Neocollins.
If infection is suspected, self-isolation is recommended and community immunization workers should be contacted immediately.