In order to diagnose herpes, a health care provider can swab an area of visibly active herpes infection or, if symptoms aren’t active, a blood test can be given that measures the number of herpes antibodies present in the body. The antibodies don’t indicate herpes itself, but rather show the immune system’s response to the presence of the virus in the body. It’s important to note that sometimes a swab can give false negative results since herpes lesions need to be large enough to yield enough detectable virus and if the outbreak is already healing it also may not be detected in a swab. (6)
This means they cannot function independently outside the living cell. Once inside, however, they provide a far different picture. They are parasitic. This means they live off the host at the host’s expense. Unless you have already been exposed to a particular virus, your body is essentially unable temporarily to prevent viral multiplication inside your body.
According to a study in the New England Journal of Medicine, more than 30% of pregnant women in the United States have genital HSV. During pregnancy, people are immunocompromised so that their body doesn’t fight the fetus as a foreign invader. And when a person’s immune system is weakened, they are more likely to have herpes outbreaks. According to Cullins, “Pregnancy is the time period when [a provider] really wants to know whether or not the person has had herpes in the past,” so they can protect the pregnant person and their infant from a herpes infection.
A 2004 study in the New England Journal of Medicine found that suppressive therapy decreases the risk of HSV-2 transmission from symptomatic, infected partners to uninfected partners by 48%. So “the risk of transmission is significantly reduced, but cannot be eliminated even with suppressive therapy,” Johnston explains, and she stresses that the virus can be passed along even without signs or symptoms.