Percentage Risk of HIV Transmission
Average risk of HIV transmission per exposure to infected source.

Centers FAQs Timeline

SourcePercentageOdds
NONSEXUAL MODES
Blood transfusion90.00%9 in 10
Needle sharing (injection drug use)0.67%1 in 149
Needlestick (percutaneous; through the skin)0.30%1 in 333
Bitting, spitting, throwing body fluids (including semen or saliva); sharing sex toysnegligiblenegligible
ORAL SEX
Receptive partner (giving a blow job)0% - 0.04%0-1 in 2,500
Insertive partner (getting a blow job)~0%about zero
VAGINAL SEX
Risk to female with HIV-positive male partner
----- High-income countries0.08%1 in 1,250
----- Low-income countries0.30%1 in 333
Risk to male with HIV-positive female partner
----- High-income countries0.04%1 in 1,250
----- Low-income countries0.38%1 in 263
ANAL SEX
Insertive parner's risk (circumcised)0.11%1 in 909
Insertive partner's risk (uncircumcised)0.62%1 in 161
Receptive partner's risk (without ejaculation)0.65%1 in 154
Receptive partner's risk (with ejaculation)1.43%1 in 70

Other Numbers to Know

  • Acute infection, roughly the 12 weeks after contracting HIV, can increase transmission likelihood 26 times, raising a 1.43% risk to 37% — higher than 1 in 3. This is because viral load skyrockets during the acute phase
  • Presence of other sexually transmitted infections (STIs) can amplify risk by as much as 8 times
  • Exposure to gender inequality and intimate partner violence an raise a woman’s HIV risk 1.5 times

Decrease HIV Risk

  • Circumcision can lower heterosexual men’s risk by 60%
  • Treatment as prevention, when HIV-positive people on meds maintain an undetectable viral load, can reduce transmission risk by 96%. Some research hints that the number may approach 100%
  • Pre-exposure prophylaxis, PrEP, when HIV-negative people take daily med like Truvada, can decrease risk by upwards of 92%, depending on adherence. Post-exposure prophylaxis, PEP, works similarly
  • Condoms, according to the CDC, lower risk on average by 80%
  • forms of seroadaptation, such as having condomless sex only with people of the same sero status, can also lower risk, but the outcomes vary

References

  • From POZ, April/May 2014

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  1. Karen @webbline
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13 Comments

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  1. matagal napo kami nag oral sex ng partner ko like 2yrs after na and now i have std is it possible to have hiv?

      1. Hello and thanks for reaching out. The only way to know your status is through HIV test po lamang. As to the possibility, yes, kasi ang HIV ay isang ring STD.

    1. Hello and thanks for reaching out. HIV risk from nipple play is extremely low and is considered a hypothetical risk.

      1. Low po ma’m it means po ba nun pag minsan lang napa dede ang bata sa ina. Maliit po ang chance na makahawa ito?

        1. Ahmmm. Bago po ito mapunta ang usapan kung saan saan, tell me po kung bakit nyo natanung ito o kung meron po ba kayong exposure?

        2. D ko alam status ng nakasex ko mam, basta sabi niya kakaanak niya lang. May makuha kasi akong milk sa boobs niya eh. Posible ba yun mam?

        3. Kahit may gatas na nakuha ma’m? Napapraning lang siguro ako kakaisip ma’m. Kaya nung nakita ko to mag comment ako agad para malaman kung paano nakukuha ang hiv.

        4. Hindi po kasi straight forward ang answer sa question mo kasi marami namang factors na dapat present para makuha mo ang virus.

          Let’s just say HIV positive yung babae, mataas ang risk mo pag meron kang cuts and sores sa bibig mo. Kung wala naman, maliit lang ang chances. Kino-consider din ang amount ng milk na nakuha mo. Hindi naman po kayo dumede na parang bata di po ba?

          Parehos din ito sa fellatio or blow job na considered na low risk. Yung virus kasi is napaka sensitive and kailangan nya ng direct access sa bloodstream upang maka pasok sa katawan. Kung ito’y na e-expose sa hangin, hindi na ito nakakapaminsala.

          At ang alam ko, lahat yata ng buntis na dumadaan sa health center binibigyan ng HIV testing to protect the unborn.