If you have ever had “mono” in high school or college, you are already intimately familiar with the Epstein-Barr Virus (EBV). But even if you have never been officially diagnosed with what’s known as the kissing disease, the odds are overwhelmingly high that this virus is currently living inside you. In fact, EBV infects roughly 95% of the global human population, according to the National Institutes of Health.

For decades, we have accepted this virus as an annoying but inevitable part of human life. However, EBV is currently making massive waves in the medical community. According to a recent report by ScienceAlert, scientists have just successfully developed a new antibody that specifically targets and blocks EBV. This is a monumental breakthrough because while the virus is usually dormant, it is increasingly being linked to the development of severe chronic illnesses later in life. Let’s unpack what exactly this virus is, how it behaves in your body and why this new scientific research is giving so many patients hope.

What is Epstein-Barr Virus?

The Epstein-Barr Virus (also known as human herpesvirus 4) is one of the most common human viruses on the planet, says the U.S Centers for Disease Control and Prevention. It was first discovered in 1964 and belongs to the herpesvirus family, though it is completely different from the viruses that cause cold sores or genital herpes.

For the vast majority of people, initial infection occurs in early childhood and causes no noticeable symptoms; it feels like a mild, passing cold. However, if you avoid the virus as a child and catch it for the first time as a teenager or young adult, it frequently manifests as Infectious Mononucleosis (“mono”).

According to the CDC, mono is characterized by extreme fatigue, a severely sore throat and swollen lymph nodes that can leave you bedridden for weeks.

What’s happening in your body

When the Epstein-Barr Virus (EBV) enters your system, it heads straight for a very specific target: your B cells. These cells are essential white blood cells that usually serve as your body’s personal antibody factories, but the virus has other plans. Instead of letting them protect you, EBV hijacks these B cells and uses their internal machinery to churn out copies of itself, turning your own cells into a viral production line.

The virus hijacks these B cells, entering them and using their internal machinery to multiply. Your body fights back by sending T cells to destroy the hijacked B cells, triggering a massive immune war within your system. This intense immune response is what causes the profound exhaustion and swollen glands of a mono infection.

As noted by Dr. Justus Rabach, MD, “There is a catch! Your body never actually kills all the virus. Once the active infection ends, EBV goes ‘latent.’ It hides silently inside your surviving B cells and goes to sleep, remaining in your body for the rest of your life.”

Causes of Epstein-Barr Virus

Because almost everyone has the virus, it is incredibly easy to catch, passing from person to person through everyday contact, the World Health Organization notes.

EBV is most commonly known as the “kissing disease” because it spreads most efficiently through saliva. However, you do not have to kiss anyone to get it. Sharing drinking glasses, water bottles, silverware or toothbrushes with someone who carries the virus is enough to transmit the infection.

While saliva is the primary culprit, the virus can also be found in blood and semen. This means it is entirely possible to contract EBV during sexual contact, blood transfusions or organ transplantations, though these routes are much less common.

Health risks and complications

For 95% of people, the dormant virus never causes any further problems. But for an unlucky minority, the virus can wake up or trigger catastrophic long-term health issues.

The medical world is fiercely focused on EBV right now because of its confirmed links to severe diseases. Research from the NIH has solidified that prior EBV infection is a leading trigger for developing Multiple Sclerosis (MS). In this debilitating disease, the immune system attacks the brain and spinal cord.

Furthermore, the virus is known to increase the risk of certain cancers, including Hodgkin’s lymphoma and Burkitt’s lymphoma, a publication in Cureus reports. This is exactly why the recent development of lab-made antibodies targeting EBV is so revolutionary – it could pave the way for treatments that stop these downstream diseases before they start.

“I’s becoming increasingly recognized that certain people are at risk of some diseases because of the infection,” says Dr. Alexander Mentzer, University of Oxford, UK.

What to do about Epstein-Barr Virus

Currently, there is no vaccine to prevent EBV and no antiviral medication that can cure it. If you are dealing with an active mono infection, treatment is entirely focused on supportive care, explains PMC.

The standard medical protocol is profound, aggressive rest. You must drink massive amounts of water to stay hydrated and use over-the-counter pain relievers like ibuprofen or acetaminophen to manage the fever and throat pain.

If you are recovering from an active EBV infection (mono), you absolutely must avoid all contact sports, heavy lifting or vigorous exercise for at least four to six weeks. The virus frequently causes your spleen (an organ tucked under your left rib cage) to become dangerously swollen and fragile. A sudden jolt or blow to the stomach during this time can cause the spleen to rupture, which is a life-threatening medical emergency.

When to See a Doctor

Mono is frequently dismissed as a rite of passage for young adults that simply requires a few weeks of heavy napping and hydration. However, while most cases are manageable with home rest, the physiological changes triggered by the virus can occasionally escalate into life-threatening emergencies.s can sometimes become dangerous.

You need to seek immediate emergency medical care if your tonsils swell so much that you have difficulty breathing or swallowing water. You must also go to the emergency room immediately if you experience a sudden, sharp and severe pain in the upper left side of your abdomen, followed by lightheadedness or confusion, as these are classic signs of a ruptured spleen.

Is EBV an autoimmune disease?

It is a common misconception to conflate a viral infection with the chronic conditions it might leave in its wake. While nearly 95% of the global adult population carries EBV, the virus typically remains dormant after the initial infection. For some individuals, however, the virus acts as a powerful environmental catalyst. Through a process often described as molecular mimicry, the immune system produces antibodies to fight the virus that mistakenly begin attacking the body’s own healthy tissues because they “look” similar to viral proteins.

The connection is most startling in the case of Multiple Sclerosis (MS). Beyond MS, researchers have observed strong correlations between EBV, Systemic Lupus Erythematosus (Lupus) and Rheumatoid Arthritis.

Is EBV considered an STD?

While researchers have indeed detected the Epstein-Barr Virus (EBV) in various bodily fluids – including semen and vaginal secretions – the medical community generally resists labeling it a traditional STD. The reasoning is largely based on the primary vector: saliva. Because the vast majority of infections occur through the sharing of drinks, utensils or kissing, categorizing it as an STD would be medically misleading and would create unnecessary stigma around a virus that nearly everyone eventually contracts through routine social interaction. Transmission is simply through saliva.

Bottom line

Epstein-Barr is a highly contagious virus that infects nearly everyone, often causing mononucleosis in young adults before becoming dormant in the body. While usually harmless in the long term, the dormant virus is a known trigger for serious conditions such as Multiple Sclerosis and certain cancers, making recent scientific breakthroughs in EBV-targeting antibodies a major leap forward for preventive medicine. Until those treatments become widely available, managing an active infection requires deep rest, hydration and avoiding physical trauma to protect your spleen.

Frequently Asked Questions

Who is most at risk for EBV?

While nearly all humans contract the virus at some point, teenagers and young adults in their late teens to early twenties are at the highest risk for developing the severe symptoms of infectious mononucleosis.

Does Epstein-Barr virus ever go away?

No, once you are infected, the virus becomes latent and goes to sleep inside your white blood cells, remaining in your body for the rest of your life.

What is the life expectancy of someone with Epstein-Barr virus?

People with the Epstein-Barr virus have a completely normal life expectancy, as 95% of the global population lives their entire lives with the dormant virus without ever experiencing severe or fatal complications.

Citations

National Institutes of Health. NIH scientists find weak points on Epstein-Barr virus. National Institutes of Health (NIH). Published March 13, 2024. https://www.nih.gov/news-events/news-releases/nih-scientists-find-weak-points-epstein-barr-virus

Nield D. Scientists Develop New Antibody For Virus That Infects 95% of People. ScienceAlert. Published May 2, 2026. https://www.sciencealert.com/scientists-develop-new-antibody-for-virus-that-infects-95-of-people

Centers for Disease Control and Prevention. About Epstein-Barr Virus (EBV). Epstein-Barr Virus and Infectious Mononucleosis. Published May 9, 2024. https://www.cdc.gov/epstein-barr/about/index.html

CDC. About Infectious Mononucleosis (Mono). Epstein-Barr Virus and Infectious Mononucleosis. Published 2024. https://www.cdc.gov/epstein-barr/about/mononucleosis.html

Hatton OL, Harris-Arnold A, Schaffert S, Krams SM, Martinez OM. The interplay between Epstein–Barr virus and B lymphocytes: implications for infection, immunity, and disease. Immunologic Research. 2014;58(2-3):268-276. doi:https://doi.org/10.1007/s12026-014-8496-1

Cleveland Clinic. Epstein-Barr Virus (EBV) – Symptoms, Causes & Treatment. Cleveland Clinic. Published July 13, 2022. https://my.clevelandclinic.org/health/diseases/23469-epstein-barr-virus

Müller-Durovic B, Jäger J, Bantug GR, Hess C. Epstein–Barr virus hijacks B cell metabolism to establish persistent infection and drive pathogenesis. Trends in Immunology. Published online December 1, 2024. doi:https://doi.org/10.1016/j.it.2024.11.011

World Health Organization. Mononucleosis (glandular fever). Who.int. Published 2025. https://www.who.int/news-room/questions-and-answers/item/mononucleosis-(glandular-fever)

Doctrow B. Study suggests Epstein-Barr virus may cause multiple sclerosis. National Institutes of Health (NIH). Published January 31, 2022. https://www.nih.gov/news-events/nih-research-matters/study-suggests-epstein-barr-virus-may-cause-multiple-sclerosis

Patel PD, Alghareeb R, Hussain A, Maheshwari MV, Khalid N. The association of epstein-barr virus with cancer. Cureus. 2022;14(6). doi:https://doi.org/10.7759/cureus.26314

PMC. Checking your browser – reCAPTCHA. Nih.gov. Published 2024. Accessed May 7, 2026. https://pmc.ncbi.nlm.nih.gov/articles/PMC9862477/