Modern HIV testing is extremely accurate, but no test can
detect the virus immediately after infection. Tests are correct more than 99% of the time.
Latest recommendations of the United States
Centre for Disease Control
- HIV testing with an immunoassay
combination test for HIV-1 and HIV-2 antibodies and p24 antigen (P24
Antigen/antibody test) within first
45 days of exposure
- Following a negative result, an immunoassay combination
test for HIV-1 and HIV-2 antibodies (Antibody test) should be done 45 days later or 3
Cross Street Medical Clinic
is approved to do HIV Testing
by the Ministry of Health Singapore. Cross Street Medical offers all relevant HIV screening tests. Speak to our doctors today about what you may need. Female doctors are available by appointment. We ensure patient privacy and confidentiality for all discussions, tests and treatments.
P24 antigen/antibody tests
(immunoassay combination test for HIV-1 and HIV-2 antibodies and p24 antigen) look for both HIV antibodies and antigens. Antigens are foreign substances that cause your immune system to activate. If you’re infected with HIV, an antigen called p24 is produced even before antibodies develop. Tests that detect both antigen and antibodies are recommended for laboratory testing. This combination test is now available as a Rapid test
Antibody tests (
immunoassay combination test for HIV-1 and HIV-2 antibodies) detect the presence of antibodies, proteins that a person’s body makes against HIV. This test is available as a Rapid test
assay looks for antibodies to the three main groups of HIV proteins. This is a labour-intensive test and is commonly used in Singapore as a confirmatory test for HIV infection.
Test is correct more than 99% of the time.
Nucleic acid test (NAT)
or polymerase chain reaction
) look for the actual virus in the blood. This test is very expensive and is not routinely used for HIV screening unless the person recently had a high-risk exposure or a possible exposure with early symptoms of HIV infection. It is commonly used as a confirmatory test for HIV infection.