How common is a false positive feline leukemia test?

How common is a false positive feline leukemia test?

Positive results are always caused by external interference, it can be observed in rapid tests. However, due to the lab research work has been done quite a lot, nowadays, false positive is not quite often. In leukemia test, serum is used as sample, if your kitten has been vaccinated before, it is likely to get a positive result with antibody test. This is not false positive.