We all have a good idea of how many sexual partners we’ve had. But how many partners have they had and what about the partners of those people? Even if your own number is low, the number of people you’ve been exposed to via indirect sexual contact is almost certainly far higher, including countless people you haven’t even met. The size of this network can actually be quantified and estimated based on the number of your sexual partners and their average number of partners.

In the calculator below, the number of people you’ve been exposed to within six degrees of connection is calculated. Input the number of direct partners you have had and how many partners you estimate each of those partners has had before you to see the true scale of your sexual exposures throughout six degrees.

While it might be shocking to see your number of exposures as a percentage of the population of a major city in your country or the nearest global city, indirect sexual exposure can have a far reach when a person’s sexual history is combined with that of his or her partners and partners’ partners – and so on for six degrees of connection. The implications are unnerving, as the greater this number of indirect sexual exposure, the greater one’s risk of contracting a sexually transmitted infection. Seen at this scale, the true level of risk from unprotected sex will hopefully have users think again about precarious relations.

Other recently published calculators make assumptions about the sexual history of your partners and their number of contacts. However, this can produce exaggerated results and an inflated number of indirect exposures. Our calculator allows you to select your own estimate of the average number of partners that your partners have had before you. As graphed above, the exponential behaviour of this situation is revealed. That is, your sexual exposure grows exponentially with the number of partners that your partners have had. This is further compounded by the number of people that you have slept with directly, the latter of which is revealed by the various lines on the graph.

Even if you and all of your partners have only single-digit numbers of direct sexual partners, this can quickly add up to hundreds of thousands of indirect exposures - a number that more than justifies taking precautions. Remember: Just one exposure is all it takes to contract a sexually transmitted infection, but correct usage of protection such as condoms can stop a transmissible infection in its tracks. If you aren’t using condoms, it’s all the more important to know your status with regular STI tests.

Given the sheer number of sexual exposures that many of us will face throughout our lives, taking an active role in your personal health and wellness is more important than ever. At Zavamed.com, we offer a range of treatments with medical professionals on a variety of sexual health concerns such as sexually transmitted infections (STIs). Several STI tests are available, along with a wide range of discreet treatment options, including Extended STI Test. All of this is available from the privacy of your own home. Visit Zavamed.com today to find out how you can look out for your health, both now and in the future.

Understanding STI Risks and Transmission


Modes of transmission: HIV can be transmitted through unprotected sexual intercourse (vaginal, anal, or oral) with an infected partner, sharing needles or syringes contaminated with HIV-infected blood, and from mother to child during childbirth or breastfeeding.

Factors influencing transmission: Unprotected sexual activity, especially if one partner is HIV-positive, increases the risk of transmission. Other factors include sharing needles or syringes with infected individuals and receiving contaminated blood or blood products.

HIV treatment: treatment for HIV/AIDS typically involves a combination of antiretroviral therapy (ART) medications. ART helps control the virus, reduces its replication in the body, and slows down the progression of the disease. Early diagnosis and timely initiation of treatment can significantly improve outcomes for individuals living with HIV/AIDS.

HIV Testing is crucial for early detection and allows individuals to access necessary medical care and support. ZAVA offers confidential HIV testing services that can be accessed through their website: ZAVA HIV Testing.


Modes of transmission: Chlamydia is primarily spread through vaginal, anal, or oral sex with someone who has the infection. It can be transmitted even if there is no penetration, orgasm, or ejaculation. The infection can be carried in semen, pre-cum, vaginal fluids, and genital fluids. Also pregnant individuals with chlamydia can pass the infection to their baby during childbirth.

Factors influencing transmission: Unprotected sexual activity is the main factor contributing to chlamydia transmission. Having multiple sexual partners and engaging in high-risk sexual behaviors can increase the chances of acquiring or spreading the infection.

Chlamydia treatment: It is important to promptly diagnose and treat chlamydia to prevent complications and reduce the risk of transmitting the infection to others. Chlamydia testing is vital, especially for sexually active individuals or those experiencing symptoms. ZAVA provides convenient and confidential chlamydia testing services. To learn more, you can visit: ZAVA Chlamydia Testing.


Modes of transmission: Gonorrhoea is mainly transmitted through sexual contact, including vaginal, anal, or oral sex, with an infected individual. It can also be passed from an infected mother to her baby during childbirth.

Factors influencing transmission: Unprotected sexual activity, particularly with an infected partner, significantly increases the risk of gonorrhoea transmission. Engaging in high-risk sexual behaviors and having multiple sexual partners can also contribute to the spread of the infection.

Gonorrhoea treatment: Early diagnosis and treatment are crucial to prevent complications and curb the spread of the disease. Testing for gonorrhoea is essential, especially for individuals who are sexually active or experiencing symptoms. ZAVA offers discreet and convenient gonorrhoea testing services. To find out more, you can visit: ZAVA Gonorrhoea Testing.


Modes of transmission: Syphilis is primarily transmitted through sexual contact, including vaginal, anal, or oral sex, with an infected individual. It can also be transmitted from an infected mother to her baby during pregnancy or childbirth.

Factors influencing transmission: Unprotected sexual activity, particularly with an infected partner, increases the risk of syphilis transmission. Having multiple sexual partners and engaging in high-risk sexual behaviors can further amplify the likelihood of contracting or transmitting the infection.

Syphilis treatment: Syphilis can be effectively treated with antibiotics, particularly in the early stages. It is important to diagnose and treat syphilis promptly to prevent further complications. Syphilis testing is vital for early detection and allows for timely treatment. ZAVA provides confidential and reliable syphilis testing services. To access their testing options, you can visit: ZAVA Syphilis Testing.


Modes of transmission: Herpes can be transmitted through direct skin-to-skin contact with an active herpes sore or lesion. This includes vaginal, anal, or oral sex, as well as kissing or touching the affected areas. Herpes can be transmitted from the mouth to the genital area or vice versa through oral-genital contact. It can also be transmitted from a mother to her baby during childbirth.

Factors influencing transmission: The risk of herpes transmission is highest when an active outbreak or visible sores are present. However, the virus can also be transmitted even in the absence of symptoms. Unprotected sexual activity and close personal contact with an infected individual increase the chances of transmission.

Herpes treatment: while there is no cure for herpes, antiviral medications can help manage symptoms, reduce the frequency and duration of outbreaks, and lower the risk of transmission. Herpes testing is important to confirm the infection and guide appropriate management and preventive measures. ZAVA offers discreet and convenient herpes testing services. To learn more about their testing options, you can visit: ZAVA Herpes Testing.

Understanding the modes of transmission and the factors influencing STI transmission is crucial for promoting safer sexual practices and implementing preventive measures to reduce the spread of STIs.

How to Use ZAVA's Sexual Exposure Calculator

Zavamed.com encourages the embedding of this interactive and the hosting of screenshots of it as well as the graph above. To embed the (responsive) calculator, you may access an embed code in the interactive above, and as seen here. When using any of these assets, or discussing the results of this calculator, we ask that you link to this page so users and those interested may learn more about the project.


Sexual exposure was derived using established formulas for a finite geometric series, which, when applied to this situation, allow the following formula for sexual exposure to be derived:


In conclusion, ZAVA offers a comprehensive range of STI testing services and discreet treatment options, including Extended STI Test and medication for herpes. With the convenience of accessing these services from the privacy of your own home, you can take control of your sexual health and receive the necessary care and support.

Prompt testing and timely treatment are crucial for early detection, effective management, and prevention of STI transmission. By utilizing ZAVA's services, you can prioritize your well-being and make informed decisions about your sexual health.

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