What is PCR test for HIV ?-- PCR stands for Polymerase Chain reaction. It is an advanced test that detects HIV even if it is present in blood in very small quantity. Hence it can detect presence of HIV much earlier as compared to ELISA, thus decreasing window period considerably. Similarly testing for p24 antigen is also a test that can decrease window period.

If a p24 test becomes negative after being positive earlier, does it mean that person has been cured of HIV infection ?-- NO. p24 is an antigen of HIV. Once HIV enters body it is found in blood in high quantity. The test is thus found to be positive at this time. After about 2 to six months virus goes into hiding in lymph nodes. At this time p24 is likely to become negative. However this is normal progression of HIV infection & does not mean that patient has been cured of HIV infection

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Do tattooing & pricking ears help to spread transmission of HIV ?-- As with shaving blades, risk of HI transmission by tattooing needles is low. However it is always advisable to use sterilize needles as risk of transmission of hepatitis B is high.

What is chance of transmission of HIV from mother to newborn ?-- The chance of transmission of HIV from mother to newborn during pregnancy & delivery is about 30% The risk of acquiring HIV through breast milk is 14-- 29 %

Can mosquitoes transmit HIV infection ?- NO. Mosquito bites have not been shown to transmit HIV.

Can birth control pills prevent HIV transmission ?-- NO.