Multiple choice Which among the following techniques is utilised in detecting viral nucleic acids? Viral isolation Western blot Polymerase chain reaction (PCR) ELISA Measuring HIV-RNA Reveal answer Fill a bubble to check yourself C Correct answer Explanation In case of HIVinfection this test finds either the RNA of the HIV virus or the HIV DNA in white blood cells infected with the virus. The PCR test is very useful to find a very recent infection.