there is no evidence to suggest that the rabies vaccine can interfere with the results of a TB (tuberculosis) blood test. These two vaccines work on completely different pathogens and do not cross-react with each other.
TB blood tests, such as the interferon-gamma release assay (IGRA) or the TB skin test (TST), are used to detect if someone has been exposed to the bacteria that cause tuberculosis. On the other hand, the rabies vaccine is used to prevent rabies, which is caused by a different virus altogether.
It's important to note that TB blood tests can sometimes give false-positive results, especially in individuals who have received the BCG vaccine for tuberculosis in the past. The BCG vaccine can lead to a positive reaction on TB tests, but it does not interfere with the rabies vaccine or vice versa.
If you have received a positive result on a TB blood test, it is essential to follow up with a healthcare professional who can interpret the results correctly and determine if further testing or evaluation is needed. They will consider your medical history, potential exposure to TB, and any relevant vaccinations to make an accurate assessment of your health status.