The different generations of ELISA

When HIV was identified as the virus that causes AIDS way back in 1986, there was a flurry of research looking into ways of identifying individuals who have been infected with the HIV virus. At the time, there was already a technique developed to detect various antibodies in the blood. This technique was called ELISA which stood for Enzyme Linked Immuno Sorbent Assay. This technique is based on the lock and key theory of antibodies. Basically, antibodies and antigens work like locks and keys. One key for one lock. One antibody fits one...

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