STD Awareness: How Can I Protect Myself if My Partner Has Herpes?

herpes protectionHas your partner, or potential partner, recently informed you that he or she has been diagnosed with genital herpes? After thinking about it, did you decide to continue with the relationship, despite not being infected with the virus that causes genital herpes yourself? Congratulations — the two of you are now a “discordant couple,” which means that one of you has genital herpes and the other doesn’t. While you might have come to the conclusion that acquiring a herpes simplex virus (HSV) infection below the belt won’t be the end of the world, you still might want to stay discordant — and do everything you can to minimize chances of virus transmission.

Condoms, medication, and abstinence during outbreaks can reduce risk for herpes transmission.

You can read all about herpes elsewhere on this blog, but here’s a quick rundown: Genital herpes can be caused by one of two strains of the herpes simplex virus: HSV-1 or HSV-2. While HSV-1 is more commonly associated with cold sores and HSV-2 is more commonly associated with genital herpes, either virus can infect the genital area. One estimate states that 1 out of 6 Americans between 14 to 49 years of age has a genital HSV-2 infection. Since genital herpes infections can also be caused by HSV-1, the number of people with genital herpes is actually higher.

Barring total abstinence from all sexual activity, you won’t be able to protect yourself completely from acquiring HSV — but there are many steps that you and your partner can take to decrease risk. Studies on discordant couples show that viral transmission can be reduced with condoms, antiviral herpes medications, practicing abstinence when symptoms are present, and patient education.


Latex condoms protect against most STDs, especially fluid-borne infections like HIV and gonorrhea. But condoms also provide some protection against STDs that are transmitted by skin-to-skin contact, including genital herpes. One large study found that condom usage was associated with lower rates of HSV-2 acquisition — the more frequently someone used condoms, the lower the risk. Unsurprisingly, risk was also associated with frequency of sex acts: People having vaginal or anal intercourse more than twice weekly were 77 percent more likely to acquire HSV-2 than people having less sex.

Other studies have reached similar conclusions, such as this study of monogamous, discordant couples, which found that HSV-2-positive men who used condoms were much less likely to transmit the virus to their female partners. Overall, for every 10,000 acts of vaginal or anal intercourse, 8.9 women acquired HSV-2 from their male partners, while 1.5 men acquired HSV-2 from their female partners. HSV-2 transmission also declined over the course of the study, possibly due to a decline in sexual activity between partners as well as counseling to use condoms and avoid sex during outbreaks.

It is difficult to perform good studies on the effect of condoms on disease transmission, because it’s unethical to ask one group of test subjects not to use condoms, and possibly not realistic to expect another group to use condoms consistently and correctly. Therefore, researchers must rely on self-reported data from their subjects and trust that the information they are providing is reliable and that they were using condoms correctly. However, researchers believe that these types of flaws lead to an underestimation of condoms’ effectiveness — so use ’em!

Herpes Medications (Suppressive Therapy)

A partner with genital herpes can consider daily herpes medications, such as acyclovir, which has been found to reduce viral shedding by as much as 94 percent. These medications, which are called “suppressive therapy” when taken daily, have not only been shown to reduce recurring outbreaks in symptomatic sufferers, but also to reduce asymptomatic shedding, offering another avenue for someone with genital herpes to protect his or her partner.

Other herpes medications include valacyclovir, whose efficacy was studied by a team that found a daily 500 mg. dose offered a 48 percent reduction in risk. Not only did this drug reduce the number of herpes outbreaks experienced by the partners with HSV infections, but it reduced risk for their HSV-negative partners, who were more than twice as likely to acquire HSV-2 from partners who were not taking suppressive therapy. For every 1,000 sex acts there were 0.60 cases of male-to-female herpes transmission and 0.23 female-to-male herpes transmissions. Transmission rates were even lower among couples who used condoms.

There are many alternative remedies, such as plant-based preparations or dietary supplements, touted as prevention against herpes outbreaks or transmission, but in general they are not supported by reliable evidence.

Abstinence During Outbreaks

When someone is experiencing symptoms of a genital herpes outbreak — blisters, itching, open or swollen sores, pain in the infected area — he or she is also “shedding virus,” meaning that HSV can be transmitted to others. Someone also might be able to recognize warning signs of an impending outbreak, such as burning, itching, or tingling sensations. When these types of symptoms are present, it is imperative to practice total abstinence until seven days after the sores heal. Because condoms do not cover the entire genital area, they do not provide adequate protection from the virus (condoms should always be used between outbreaks).

A partner with herpes should also avoid touching the sores, as he or she could transfer the virus to another place on the body (such as the facial area), to a contact lens, or to another person. If you have touched a herpes sore, be sure to wash your hands with soap and water immediately afterward.

Unfortunately, most HSV transmissions occur during periods of asymptomatic shedding — when there are no outbreaks.

Patient Education

In the 1980s, before the common use of herpes medications like acyclovir, one group of researchers conducted a study on HSV-2-discordant couples. This represented a “best-case scenario” in that the couples were educated on recognizing mild or atypical herpes outbreaks, were counseled to practice abstinence until four days after sores had healed, were taught about condom use, and were highly motivated to avoid HSV-2 transmission. They concluded that the risk of genital HSV transmission was:

  • 10 percent per year, overall
  • 20 percent per year if the partner without genital herpes had not been previously infected with HSV-1 (the virus most commonly associated with cold sores)
  • 16 percent per year in women who already carried HSV-1
  • 32 percent per year in women who did not carry HSV-1

Presumably, HSV transmission rates are higher in the absence of this education, safer sex practice, and desire to mitigate risk. In this study, the factors that made the biggest difference in whether or not someone caught a genital HSV-2 infection from her partner was the consistent use of condoms and spermicide, even during asymptomatic periods.

If you have a genital HSV infection, you can ask a sexual health expert, such as a provider at Planned Parenthood, to educate you on how to be more aware of any cues that the virus is flaring up. Although truly asymptomatic shedding does occur, patients can be made more aware of how to recognize mild or nonspecific symptoms that might signal an infectious period.

Other Strategies

A healthy immune system can help keep viral infections in check. While there are a lot of dietary supplements out there that claim to “boost” immunity, there actually aren’t any magic bullets to ensure a strong immune system. The best things you can do to boost your immunity are to quit smoking, eat a healthy diet, get enough sleep, and avoid stress.

Some conditions, like an HIV infection or receiving chemotherapy for cancer, can compromise the immune system, which can make it more difficult for your body to control a herpes infection.

Planned Parenthood health centers have condoms, can diagnose and treat herpes, offer patient education on herpes symptoms and transmission, and can help you decide if herpes medications are right for you.

Click here to check out other installments of our monthly STD Awareness series!

14 thoughts on “STD Awareness: How Can I Protect Myself if My Partner Has Herpes?

  1. Are these numbers for real? “For every 1,000 sex acts there were 0.60 cases of male-to-female herpes transmission and 0.23 female-to-male herpes transmissions.” And that’s on valtrex? So an even less than 1 in 1,000 chance if one person is on meds? What’s the big deal then?

    • Those numbers are per sex act, so depending on how often a couple has sex, the chances per year would be much higher. The risk might be acceptable to some, unacceptable to others.

      Here’s the relevant paragraph from the New England Journal of Medicine:

      The median number of sexual contacts per couple during the study was 49 in the valacyclovir group and 46 in the placebo group (range, 0 to 482). The frequency of genital HSV-2 acquisition increased with the reported frequency of sexual activity and was 0.35 per 1000 sexual contacts among the susceptible partners of valacyclovir recipients, as compared with 0.68 per 1000 sexual contacts among the susceptible partners of placebo recipients. The respective rates of acquisition among susceptible women were 0.60 and 1.27 per 1000 sexual contacts and, among susceptible men, 0.23 and 0.35 per 1000 sexual contacts.

    • So, take this with a grain of salt, as I haven’t taken my biostats classes yet, but I believe these numbers would translate to a 3.07% chance of a female catching herpes from a male after 52 sex acts (say after a year of having sex once a week on average), while a male would have a 1.19% chance of catching herpes from his female partner after 52 sex acts, assuming the person with herpes was taking valacyclovir.

      I used this cheat sheet, where the herpes was represented by 52 lottery tickets. T=1000, W=0.6 or W=0.23, and P=52. Take it with a grain of salt as I’m not a statistician!

  2. Ann,

    I believe the cheat sheet you used for your calculations would not be the proper one to use for this example. You are also using 52 for sex acts based on once a week. If you were using this number, your number for W would be much less as .6 and .35 are based on 1000 sex acts. Based on the numbers from the report, to me at least, its saying that for every 1000 sex acts for women susceptible to HSV-2, .6 women contracted the disease when their partner was on Valtrax while 1.27 women contracted it when their partner was not on Valtrax. If you put this into a percentage, this means .6/1000 and 1.27/1000 for women and .23/1000 and .35/1000 are the only formulas you would need to use.

    If it indeed cuts down viral shedding by up to 94%, that is a major factor in the reduction in transmission. What the report doesn’t say though, is whether the couples abstained during outbreaks. Now you add condoms to the mix, and its even lower. I know people that have been on suppressive therapy for years and have not had any outbreaks during that entire time. Most people who transmit the disease do not know they have it, therefore they are not taking medication to help control it. I do believe a cure is on the way for both HSV-1 and HSV-2 as they have now determined what causes Herpes to go into latency in both versions of the disease which makes it impossible to kill. Once a drug can be created and tested that will bring all herpes cells out of hibernation, it can be killed using the same drugs used for suppressive therapy. Think of it as one massive outbreak bringing the condition to an end. Its still a ways off due to lack of funding for clinical trials, but search for Duke University and University of Florida herpes research to learn more about this discovery.

  3. I have a question my girlfriend has herpes 2 I’ve done reading got tested checked out clean…but yesterday we were making out and I noticed she had wat looked like a bit of blood on her lips although she was wearing red lipstick at the time and maybe I’m just over thinking but my question if I did ingest a bit of her blood can the virus still be passed on? I

    • Herpes is spread by skin-to-skin contact. If your girlfriend has an HSV-2 infection in her genital region, it can only be transmitted via contact with her genital region — not by kissing. The herpes virus doesn’t hang out in the blood. (According to Ask Alice, small amounts of virus might enter the bloodstream during the first herpes outbreak. So if your girlfriend has had HSV-2 for a while, you don’t have to worry about even that small possibility.)

      According to the Red Cross, people with herpes can donate blood: “Chlamydia, venereal warts (human papilloma virus), or genital herpes are not a cause for deferral if you are feeling healthy and well and meet all other eligibility requirements.”

  4. Of the 267 Women 9 got it during the study period. That suggests in active couple that woman likely have 3% chance of getting it after a sustained time period and sexual encounters. I’d also suspect the results would be in the double digits if we were talking about a couple where they both didn’t know that one of them has it. The risk is real over time but not a deal breaker if you think the person is the “one”. Does suggest not to be too casual and have repeated acts with someone that you don’t deem to have long term relationship potential.

    Participants A total of 528 monogamous couples discordant for HSV-2 infection, including an HSV-2–susceptible population of 261 men and 267 women.

  5. I am 23yrs of age and I was diagnosed with HSV 2 a few months ago . My partner complained of discomfort after sex with me and when I checked it out a week later I had the virus and a blister on my anus. I felt like my life had ended and was worried because we had broken up and I had sex with a new partner while I was on the last day of my period . After I was diagnosed I was paranoid I had passed the virus to my new partner but I had not. We have been having safe sex whilst I have no symptoms of an outbreak and everything has been gud until now. I was again on my last day of my period and we had unprotected sex in the shower with the water running and within less than 3hours of intercourse my parter started complaining about discomfort. Based on my research it says the virus cannot be passed on via the blood but I am concerned the only time my virus seems to b passing on is during my period. We are going to the doctor tomorrow and I’m praying that he hasn’t contracted the virus from me .

    • Herpes can be transmitted even when no symptoms are present, because the virus can be “shed” from your body without symptoms. However, some things can “trigger” the virus, including menstruation. To reduce risk of transmitting the virus to your partner, it’s important to use condoms each and every time, in combination with other risk-reducing strategies like medications (acyclovir).

      Good luck, and the doctor should be able to answer your questions. Make sure to write them down first, so you don’t have to worry about forgetting to ask.

  6. My question is that I the male has genital hsv2 for some years and the female has oral hsv1. We been married for 22 yrs. now and I found out 2 yrs. ago I hve genital hsv2 from a past relationship like over 20 yrs. ago. Can she get genital hsv2 from me if we continue to have unprotected sex?

    • Yes. Because HSV-2 can be transmitted by skin-to-skin contact, you can pass the virus to your wife during sex. Condoms will reduce the risk but are limited by how much skin they cover. If she has HSV-1 she has some, but not complete, protection from symptoms of an HSV-2 infection. Has your wife had a blood test for HSV-2? It’s possible she already has it, but never got symptoms. Most people with HSV-1 or HSV-2 don’t get symptoms.

        • I don’t remember seeing any studies on whether a person with a long-term asymptomatic HSV-2 infection can stop shedding the virus completely, but I’ll take another look and see if I can find one. But probably the best thing to do is to talk to a qualified health care provider for advice on whether you should start using condoms or taking suppressive medication. It also depends on how your wife feels about the possibility of getting HSV-2. Some people are willing to take the risk.

  7. I just found out that I have hsv today, Should I tell my exboyfriend? He the only one I have been with in the last two yesrs. But I’m not sure if it came from a past relationships 3 years ago.

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