Tuberculosis, or TB, may not come up as often as flu or pneumonia in everyday conversations, but it remains present in Singapore.
The recent TB clusters in Bedok Central have brought the disease back into the spotlight. They have also raised a common question among many Singaporeans: if we received the Bacille Calmette-Guérin (BCG) vaccine as children, are we still protected from TB today?
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Can I still get TB even though I was vaccinated as a child?
Yes, adults in Singapore can still get tuberculosis even if they received the BCG vaccine as children.
The BCG vaccine helps protect babies and young children against severe forms of TB, such as TB meningitis and widespread TB. However, it offers limited protection against adult pulmonary TB, which is the form that most commonly affects the lungs.
If you have a cough lasting more than three weeks, fever, night sweats, unexplained weight loss, fatigue, chest pain, or coughing blood, seek medical attention early.
The recent news about three TB clusters in Bedok Central has made headlines over the past few months, bringing a stark reminder that TB is still very much around in Singapore.
Though largely endemic (regularly found or common in a particular group or area), TB is curable, and its spread is preventable.
According to the Communicable Diseases Agency (CDA) Singapore, there were 1,019 new cases of active TB disease among Singapore residents in 2025, even as the number of active cases has declined in recent years.
For many Singaporeans who received the Bacille Calmette-Guérin (BCG) vaccine as children, the question is whether childhood vaccination still protects them today.
While BCG vaccination reduces the risk of severe childhood TB, it does not provide complete lifelong protection against adult pulmonary TB.
However, TB infection continues to be present in Singapore and can flare up again, as the recent Bedok cluster has shown.
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Table of Contents
Can you still get TB after BCG vaccination?
Yes. You can still get TB even if you received the BCG vaccine as a child.
BCG vaccination is part of Singapore’s childhood vaccination schedule and is given at birth. Many Singaporeans may remember receiving the vaccine as children, or still have the small scar that it often leaves behind.
The BCG vaccine is important because it helps protect babies and young children against serious forms of TB, such as TB meningitis and disseminated TB. These forms of TB can be severe and dangerous in young children.
However, BCG offers limited protection against pulmonary TB, which affects the lungs and is the most common form of TB among adults.
This can be confusing because many people assume vaccination means full protection. In the case of TB, protection is important but incomplete. Childhood vaccination reduces the risk of severe TB in young children, but it does not remove the possibility of adult TB infection.
Being vaccinated does not mean TB symptoms should be ignored. If symptoms appear, especially a cough lasting more than three weeks, it is still important to seek medical attention.
What is TB, and how does it spread?
Tuberculosis is an infectious disease caused by the bacterium Mycobacterium tuberculosis. It most commonly affects the lungs, though it can also affect other parts of the body, including the lymph nodes, bones, brain, kidneys, and spine.
TB spreads through droplets released into the air when a person with active TB disease coughs or sneezes. This is why pulmonary TB, which affects the lungs, is the main form of TB that raises public health concerns.
However, TB does not usually spread through casual contact such as sharing utensils, touching surfaces, or brief contact in public places. It is not like catching a cold from passing someone briefly on the street.
The risk of transmission is higher with prolonged close contact, especially in poorly ventilated spaces. This is why household members, close workplace contacts, or people who spend long periods in the same enclosed environment as an infectious person may be asked to go for screening.
Understanding how TB spreads is important because it helps prevent unnecessary panic. The concern is not casual exposure, but repeated or prolonged exposure to someone with active infectious TB.
The difference between latent TB and active TB
One of the most important things to understand is the difference between latent TB and active TB.
Type of TB | What it means | Symptoms | Can it spread to others? | What may happen next |
|---|---|---|---|---|
Latent TB | TB bacteria are present in the body but inactive | No | No | Preventive treatment may be offered to reduce the risk of future active TB |
Active TB | TB bacteria become active and cause illness | Yes, usually | Yes | Medical treatment should begin ASAP |
Latent TB means the TB bacteria are present in the body but inactive. People with latent TB do not have symptoms and cannot spread TB to others. They may feel completely well and may not know they carry the bacteria unless they are tested.
Active TB disease occurs when the bacteria become active and cause illness. This is when symptoms may appear and, if the lungs are affected, the disease can spread to others through respiratory droplets.
Active TB can cause symptoms such as a prolonged cough, fever, night sweats, unexplained weight loss, fatigue, and coughing blood. These symptoms can develop gradually, which is why TB may sometimes be mistaken for a lingering cough, post-viral illness, or general tiredness.
Latent TB can become active months or years later if your immune system weakens. This is why some people may develop active TB long after their first exposure, even if they had no symptoms at the time.
What symptoms of TB should adults watch for?
TB symptoms can be subtle at first. A cough lasting more than three weeks should be checked by a doctor, especially if it does not improve or keeps returning.
Other symptoms of TB may include:
- Fever
- Night sweats
- Unexplained weight loss
- Fatigue
- Chest pain
- Coughing blood
- Loss of appetite
These symptoms may not appear all at once. Some people may experience only mild symptoms initially, which can make TB easy to dismiss as a lingering cough or post-viral illness.
Early testing helps confirm whether symptoms are due to TB or another respiratory condition. Tests may include a chest X-ray, sputum test, blood test, or other investigations, depending on your doctor’s assessment.
Anyone with possible TB symptoms should avoid delaying medical care. Early diagnosis helps ensure treatment begins promptly and reduces the risk of spreading the infection to others.
What childhood BCG vaccination does and does not protect against
BCG vaccination is part of childhood vaccination in Singapore and has been given to newborns since 1957. Many Singaporeans would remember receiving the vaccine as children, or still have the small scar that it often leaves behind.
The BCG vaccine is effective in preventing serious forms of childhood TB, such as TB meningitis and disseminated TB. These forms of TB can be severe and dangerous in young children, which is why childhood vaccination remains important.
However, BCG offers only limited protection against pulmonary TB, which is the most common form among adults. This means adults who were vaccinated as children can still develop TB later in life.
This can be confusing because many people assume vaccination means full protection. In the case of TB, protection is important but incomplete. Childhood vaccination reduces the risk of severe TB in children, but it does not remove the possibility of adult TB infection.
Being vaccinated does not mean TB symptoms should be ignored. If symptoms appear, especially a cough lasting more than three weeks, it is still important to seek medical attention.
Who may be at higher risk of TB
Anyone can be exposed to TB, but certain groups face a higher risk.
People who have prolonged close contact with someone who has active TB are at greater risk of infection. This includes household members, close colleagues, or those who spend extended time in the same indoor environment.
Older adults, people with weakened immune systems, and individuals with chronic conditions may be more vulnerable if exposed. Conditions such as diabetes, kidney failure, HIV infection, and cancer treatment can increase the risk of latent TB becoming active.
People living or working in crowded or poorly ventilated environments may also face a higher risk of exposure. Ventilation matters because TB spreads through airborne droplets, and poorly ventilated spaces allow infectious particles to remain in the air longer.
Anyone who has been contacted for TB screening should attend the screening even if they feel well. This is especially important because latent TB has no symptoms but can still be detected and treated to reduce future risk.
What should you do if you are contacted for TB screening?
If you are identified as a close contact or contacted by the Singapore health authorities for TB screening, attend the screening even if you feel well.
This is because latent TB does not cause symptoms. You cannot tell whether you have latent TB based on how you feel.
TB screening may involve a blood test and, if needed, a chest X-ray or further tests. A positive blood test does not automatically mean you have active TB disease. It means further checks may be needed to determine whether it is latent TB infection or active TB disease.
Screening helps detect infection early and allows treatment to begin if needed. It also supports wider public health efforts by reducing the chance of further spread.
How to protect yourself from TB
Protecting yourself starts with awareness and taking symptoms seriously.
If you are notified by health authorities or identified as a close contact, attend TB screening even if you feel well. This helps detect latent or active TB early and supports wider public health efforts.
Seek medical attention early if symptoms such as prolonged cough, fever, night sweats, or unexplained weight loss appear. Delaying care may allow the condition to worsen or spread.
Where possible, keep living and working spaces well ventilated. Good ventilation reduces the risk of airborne transmission in shared indoor spaces.
Good respiratory hygiene also matters. Cover coughs and wear a mask when unwell, especially if you have respiratory symptoms.
Managing chronic conditions such as diabetes well is also important, as weaker immunity can raise TB-related risk. A healthier immune system reduces the likelihood that latent TB will become active.
If diagnosed with TB, completing the full course of treatment is essential. Incomplete treatment can lead to drug resistance and ongoing transmission, making the disease harder to treat and control.
How is TB treated?
TB is curable, but you must be patient because TB treatment usually takes time.
Active TB disease is treated with a course of medication that must be taken as prescribed. Depending on the condition and treatment plan, this may involve several months of medication and follow-up.
People diagnosed with active TB may also need medical leave, temporary isolation, or closer monitoring, especially if they are infectious or unwell.
Latent TB infection may also be treated to reduce the risk of it becoming active in the future. This is especially important for people at higher risk or those identified through contact tracing.
Completing treatment is important even if your symptoms improve. Stopping treatment too early can allow the bacteria to survive, increase the risk of relapse, and contribute to drug-resistant TB.
How insurance can help if TB becomes serious
Whether your health insurance can help with TB depends on the type of care needed and the terms of the policy.
For many people, TB care may involve outpatient consultations, tests, medication, and follow-up.
Corporate Insurance may help cover GP visits, outpatient consultations, specialist referrals, diagnostic tests, or medication, depending on your employer’s plan. For working adults, this can help reduce out-of-pocket expenses when seeking early medical advice or follow-up care.
MediShield Life and Integrated Shield Plans are usually more relevant if TB leads to hospitalisation, isolation, or serious complications requiring inpatient care. This may happen if the infection is severe, if complications develop, or if closer monitoring is needed.
Critical Illness Insurance usually does not pay simply because someone is diagnosed with TB. It may only respond if TB leads to a covered complication that meets the policy definition.
Disability Income Insurance may help replace your income if a prolonged illness prevents you from working, subject to the policy terms. This can be especially relevant if recovery takes longer than expected or if medical leave affects your household income.
In short, TB itself may not automatically trigger every type of insurance payout. The claim depends on the type of treatment, whether hospitalisation is needed, whether complications occur, and what the policy covers.
Understanding these distinctions can help you and your family prepare more realistically. TB may be curable, but treatment and recovery can still affect finances, work, and caregiving arrangements.
Know your coverage, before you need it
Childhood BCG vaccination reduces the risk of severe childhood TB, but it does not eliminate adult TB risk.
The Bedok clusters are a reminder that TB remains a public health issue in Singapore. While TB is curable and its spread is preventable, early screening and prompt medical attention remain important.
Completing treatment also protects both individuals and the wider community. TB control depends not only on diagnosis, but on ensuring patients complete the full course of medication and follow-up.
Understanding how outpatient care, hospitalisation, and income protection work helps families prepare if TB becomes more serious.
Review your health insurance coverage with our Coverage Checker.
