How long after taking a shot against the flu virus (influenza) should a person wait in order to get an accurate ELISA test?
What conditions should be observed to avoid a false positive ELISA? And a false Negative? How infectious is HIV? thank you for your answers. It used to be recommended that you not test for eight weeks after getting a flu shot. Nowadays, with the test improvements in reacting specifically to HIV antibodies, I usually ask people to wait 4 weeks. There really are no specific conditions to avoid a false positive-they just happen, rarely. Recently there have been thought to be a cluster of false positives, using the oral rapid test,in San Francisco. This is currently being investigated by the CDC and other agancies. Meanwhile, the FDA just issued a letter to test sites stating they have confidence in the test procedures currently used, and to contine using the test. False negatives are very rare, usually caused by not enough time in between becoming infected and getting tested. Most people will test positive (if infected)by day 30 after infection, but a small number can take up to three mon
