There is absolutely nothing wrong with a rapid test. They use them in London in Harley Street (I was tested there once). Only takes 40 mins for results. If you have been told differently then it is wrong.
The rapid test is a screening test. It is highly sensitive. The main problem with the rapid test is that because it is so sensitive you get false positives ie people without hiv still test positive. These are usually due to human error in the testing. False negatives (ie you are positive but test negative) are very rare and usually due to the window period after initial infection before antiboies have developed which is usually about 3 weeks long.
Elisa tests are confirmatory tests. They are used to confirm the results of the rapid tests. This is where the false positives are identified. If you test positive with a Rapid test the doctor will immediately tell you that the result is not conclusive and that it can only be confirmed by an Elisa test.
PS I have a PhD and worked for years in desease diagnostics.
The rapid test is a screening test. It is highly sensitive. The main problem with the rapid test is that because it is so sensitive you get false positives ie people without hiv still test positive. These are usually due to human error in the testing. False negatives (ie you are positive but test negative) are very rare and usually due to the window period after initial infection before antiboies have developed which is usually about 3 weeks long.
Elisa tests are confirmatory tests. They are used to confirm the results of the rapid tests. This is where the false positives are identified. If you test positive with a Rapid test the doctor will immediately tell you that the result is not conclusive and that it can only be confirmed by an Elisa test.
PS I have a PhD and worked for years in desease diagnostics.
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