Is Glandular Fever Contagious?
Written by Dr Nelson Lau, MBBS FRACGP, GP & Digital Health Specialist. Originally published on 27 May 2024. Blog updated on 08 July, 2026.
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This blog is for educational purposes only and does not replace professional medical advice or diagnosis. If you have health concerns, consult an AHPRA-registered telehealth GP or request a medical certificate online if clinically appropriate.
Overview
Glandular fever, also known as infectious mononucleosis, is a common illness in Australia, especially among teenagers and young adults. It's caused by the Epstein-Barr virus (EBV), which spreads easily through saliva. While most people recover well, it can leave you feeling very run-down for weeks. Let us see what a glandular fever is and how a telehealth consultation can be a convenient option for medical advice and clinical review. Commonly known as the "kissing disease," this illness is infamous among teenagers and young adults for its mode of transmission. This comprehensive exploration will explain glandular fever, examining its symptoms, causes, management options, and frequently asked questions, equipping you with knowledge regarding this viral infection.Consult an AHPRA-registered practitioner online, anytime
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What Is Glandular Fever?
Glandular fever is a viral infection that affects the immune system. It often starts with a sore throat, fatigue, and swollen glands in the neck. The illness is sometimes called "kissing disease" because it spreads mainly through saliva. Glandular fever known scientifically as infectious mononucleosis, is primarily triggered by the Epstein-Barr virus (EBV). This virus targets the white blood cells important to your immune system's defences. This disease is a prevalent reason behind prolonged absences from academic or professional engagements among young individuals, due to its debilitating symptoms and the recovery time it demands.Symptoms of Glandular Fever
- Sore throat (often severe)
- Extreme tiredness and weakness
- Swollen lymph nodes in the neck or armpits
- Fever and night sweats
- Loss of appetite
- Headaches or body aches
- Swollen spleen (in some cases)
Who Does Glandular Fever Affect?
Glandular fever mostly affects teenagers and young adults in Australia, typically between the ages of 15–25. Children may catch it too, but their symptoms are usually mild and may be mistaken for a simple cold.Causes & How Contagious It Is
The Epstein-Barr virus spreads chiefly through saliva, earning glandular fever its moniker linked to kissing. Yet, it can also traverse via shared utensils, beverages, and personal items like toothbrushes—essentially, any conduit for saliva transfer. The virus is highly contagious, especially in the first few weeks of infection. It spreads through saliva but can also pass via close contact. Ways it spreads:- Sharing drinks, food, or cutlery
- Close contact
- Coughing or sneezing near others
How Long Are You Contagious?
- First few weeks of illness: Most contagious
- Up to 2 months: Virus may still be in saliva
- In some people, EBV can remain in saliva for 6 months or more, but the risk of spread is much lower
Does Glandular Fever Require Isolation?
Typically, isolation isn't necessary for someone with glandular fever, mainly because it requires such close contact for transmission. Most people continue their daily routines, but should focus on getting plenty of rest, staying hydrated, and avoiding strenuous activities to protect their swollen spleen and aid in recovery. It's more about slowing down and taking care of yourself than completely withdrawing from your social life.Prevention & Reducing Spread
- Avoid sharing food, drinks, or utensils
- Don't have close contact while sick
- Wash your hands regularly with soap and water
- Rest and support your immune system to recover faster
- Cover coughs and sneezes with a tissue or elbow
How Is Glandular Fever Diagnosed?
Healthcare providers typically review clinical symptoms and medical history, followed by specific blood tests, to diagnose glandular fever. These tests look for antibodies against the EBV or an increased number of white blood cells, which commonly arise during infection. Sometimes, further testing is required to rule out other illnesses with similar symptoms, such as strep throat.What Happens to Your Body When You Have Glandular Fever?
Upon infection with EBV, the virus infiltrates white blood cells, multiplying within them and hindering your immune response. In defence, your body enlarges lymph nodes and the spleen to ramp up the production of immune cells, which fights off the infection but also causes swelling and fatigue. This internal battle, while necessary, is the primary reason behind the prolonged symptoms of glandular fever.Glandular Fever Management
Managing glandular fever is a gradual process; think more of a marathon than a sprint. Since it's a viral infection, antibiotics won't be effective unless there's a secondary bacterial issue. Instead, you'll need to rely on conservative measures: rest, hydration (water or herbal tea are your best bets), and some over-the-counter medications to handle the fever and sore throat. Doctors will also likely suggest skipping contact sports or heavy lifting for a while because an enlarged spleen is more prone to rupture. No magic bullet will cure it, but a warm saltwater gargle or soothing lozenge can help ease the throat pain. Every little bit counts. Despite the somewhat daunting nickname and the severe symptoms it can manifest, glandular fever is generally manageable with careful personal health management and a bit of social discretion. Remember, while it's fine to socialise with someone who has glandular fever, maintaining personal hygiene and being mindful of your interactions, like sharing food or drinks, is crucial. If you suspect you have glandular fever, a trip to your healthcare provider is prudent—they can help confirm the diagnosis and guide you through recovery.Complications to Watch For
Most people recover well, but some may develop complications like:- Enlarged spleen (risk of rupture if injured)
- Ongoing fatigue lasting weeks or months
- Rarely, liver inflammation or jaundice
What Is the Difference Between Tonsillitis and Glandular Fever?
Glandular fever and tonsillitis might sound very similar to swollen glands and a sore throat. But tonsillitis usually stays local, mainly affecting the tonsils because of viruses or bacteria like streptococcus. It makes swallowing feel like trying to eat sandpaper and can also be associated with a fever. If bacteria are the culprit, antibiotics are your golden ticket; but if it's a viral case, you'll simply need rest and conservative management to get back on your feet. Glandular fever, however, is a different story as it plays a long game. It's a systemic illness that doesn't just stop at your throat. When the Epstein-Barr virus (EBV) takes hold, your lymph nodes and spleen swell up, and fatigue lingers for weeks or even months. Unlike tonsillitis, where you might feel better after a few days of medications and conservative management, glandular fever can leave you exhausted for a long time. The key is managing those symptoms as best as possible because there's no easy way to fight off the virus itself.When to Consult a Doctor
Consult a doctors or medical practitioner if you have a severe sore throat, fever that doesn't ease, or extreme fatigue. You should also seek urgent care if you experience sudden abdominal pain (which could signal spleen issues) or difficulty breathing/swallowing. If you experience persistent symptoms like a severe sore throat and unusual fatigue lasting more than a week, it's advisable to consult a online doctor or medical practitioner provider. Immediate medical attention is crucial if you encounter intense abdominal pain or significant neck swelling, which could signify spleen complications, a condition requiring prompt medical intervention. If you experience severe, worsening, or life-threatening symptoms, call 000 immediately or attend your nearest Emergency Department (ED). Examples include chest pain, breathing difficulties, stroke symptoms, severe allergic reactions, loss of consciousness, or significant injuries.How Hola Health May Be Able to Help
Hola Health is an Australian telehealth platform that connects you with registered doctors and nurse practitioners - from the comfort of your home, at a time that suits you. Depending on your situation, a Hola Health clinician may be able to help with:- 24/7 General medical advice via online doctor consult - talk through symptoms or health concerns with a registered doctor or medical practitioner.
- Doctors certificate - for work or personal leave, when clinically appropriate
- Referrals to specialists - or in-person services when needed
- Instant scripts - at a clinician's discretion and where clinically suitable.
FAQs
Can you go to work or school with glandular fever in Australia?
It's best to stay home in the early weeks, as you're most contagious and likely too tired. Return when your doctors or medical practitioner says it's safe and you feel stronger.How long should you rest after glandular fever?
Most people need at least 2–4 weeks of rest. Full energy levels may take a few months to return.Can you get glandular fever more than once?
Usually, once infected, your body builds immunity. Rare cases of reactivation can occur, but they are uncommon.Does glandular fever ever go away?
Yes, the acute symptoms of glandular fever generally resolve within two to four weeks except for fatigue which lasts longer. Once you've contracted EBV, it remains dormant in your body indefinitely, typically without causing further symptoms. However, a healthy immune system usually keeps the virus in check, preventing reactivation, unless there are major triggers such as stress, a compromised immune system, or significant hormonal changes.How do I know if my sore throat is glandular fever or just a cold?
A cold usually improves in a week. If your sore throat is severe, with swollen glands and extreme fatigue, it's worth checking with your doctors or medical practitioner.Is glandular fever the same as mono?
Yes – "mono" is the US name for glandular fever. In Australia, we commonly use "glandular fever."How long is glandular fever contagious after symptoms?
You're most contagious for the first few weeks. However, the virus may remain in your saliva for months.Is glandular fever contagious through the air?
The good news here is that glandular fever is not airborne. You cannot catch it just by breathing the same air as someone infected. Transmission requires much closer contact, specifically involving saliva. This means you can still attend classes, go to work, or sit in a cafe without fear of catching the virus from the air.What foods or drinks help recovery from glandular fever?
Stay hydrated with water and warm teas. Soft, soothing foods like soups, smoothies, and yoghurt can help if your throat is sore.Can glandular fever be prevented?
While completely preventing glandular fever might not be feasible, practising good hygiene can reduce your risk. This includes not sharing eating utensils, drink containers, or personal items that come into contact with saliva. Regular hand washing and avoiding close contact with people who are ill can also help keep this virus at bay.Is strep throat the same as glandular fever?
No, strep throat and glandular fever are caused by different pathogens. Strep throat is a bacterial infection requiring antibiotic management, whereas glandular fever is a viral infection and does not respond to antibiotics. Distinguishing between them is crucial as it influences management decisions.Can stress cause glandular fever?
While stress alone doesn't cause glandular fever, it can weaken your immune defences, making you more susceptible to infections, including EBV. Managing stress through adequate rest is important in ensuring you have the best fighting chance against EBV.Consult an AHPRA-registered practitioner online, anytime
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Disclaimer
This blog is for general informational purposes only and does not indicate that Hola Health provides all treatments or preventive measures mentioned. It is not intended to be a substitute for professional medical advice. Always seek the guidance of your doctor or other qualified health professional with any questions you may have regarding your health or a medical condition. For emergencies please immediately contact 000. Any medical topics discussed are intended to educate, not to imply availability through Hola Health. Hola Health's telehealth services facilitate access to AHPRA-registered healthcare professionals in Australia; however, a telehealth consultation is not equivalent to an in-person medical examination. Telehealth may not be appropriate for all conditions, symptoms, or circumstances.
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