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HIV PEP:
Stop HIV within 72 hours of sex
HIV Testing:
20 min result, 28 days after sex
STD Testing:
Full & comprehensive

HIV Window Period, Singapore - Shim Clinic

The HIV window period is the duration of time from when an HIV infection occurs, to the time when a HIV test can reliably detect a HIV positive result.

The HIV window period:

  • During the HIV window period, the HIV test may be negative.
  • During the HIV window period, the HIV viral load is extremely high, thus making the person highly infectious.
  • 4 weeks after exposure, a negative HIV 4th generation test “is very reassuring / highly likely to exclude HIV infection.”
  • 12 weeks after exposure, a negative HIV 3rd generation test “would definitively exclude HIV infection.”

References


Related Concepts

Sexual risk (of HIV/STD/pregnancy), and what you can do before and after exposure.

Timeline HIV STD Pregnancy
Before exposure
Abstain from sex, Be faithful, or Condom use
Circumcision (males only)
Contraception
(females only)
HIV PrEP (pre-exposure prophylaxis)
– Stop HIV infection before exposure
STD vaccine:
Hepatitis vaccine
HPV vaccine
STD / HIV exposure
Unsafe sex / unprotected sex:
No condom / Condom broke / Condom slip
0-72 hours HIV PEP (post-exposure prophylaxis)
– Stop HIV infection after exposure
STD testing *
Screening test
– to look for asymptomatic infections
– from previous exposures
Emergency contraception
with the
morning-after pill
(females only)
2 weeks HIV DNA Test
1 month HIV 4th Generation Test
SD Bioline HIV Ag/Ab Combo
– Fingerprick blood sampling.
20 minutes to results
3 months HIV 3rd Generation Test
OraQuick® HIV-1/2 Antibody
– Oral fluid or
– Fingerprick blood sampling.
20 minutes to results
STD testing *
– Full & comprehensive
diagnostic test
– to look for current infections
Watch for HIV Symptoms STD Symptoms
If infected HIV Treatment STD Treatment Abortion

* Males: Do not urinate for at least 4 hours before arriving.
* Females: testing is more accurate when you are not menstruating.


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