Is there a vaccine for TB? 

Yes, there is a vaccine for tuberculosis known as the BCG (Bacillus Calmette-Guérin) vaccine. While it does not provide absolute protection against all forms of the disease, it is highly effective at preventing the most severe types of tuberculosis in children, such as TB meningitis. In the UK, the vaccination strategy focuses on protecting individuals who are at a higher risk of exposure rather than offering it as a routine immunisation for the entire population. 

What We’ll Discuss in This Article 

• The current status of the BCG vaccine in the UK immunisation schedule. 

• Eligibility criteria for infants and older children. 

• How the vaccine works and the level of protection it offers. 

• Normal reactions and common side effects after the injection. 

• Guidance for adults and occupational health requirements. 

• Why some individuals cannot have the BCG vaccine. 

The BCG vaccine in the UK 

The BCG vaccine is a live vaccine that contains a weakened form of a bacterium similar to the one that causes tuberculosis in humans. It was once given routinely to all secondary school children in the UK, but this programme was stopped in 2005 as TB rates in the general population fell to very low levels. Today, the NHS offers the BCG vaccine only to people who have an increased risk of coming into contact with tuberculosis. This targeted approach ensures that those most likely to be exposed receive protection early in life. 

Who is eligible for the vaccine? 

Eligibility is primarily based on the risk of exposure, which is often determined by geography or family history. Babies and children are the main groups targeted by the current UK programme. 

Group	Eligibility Criteria
Infants	Born in an area of the UK with high TB rates.
Family history	Parents or grandparents born in a high-incidence country.
Close contacts	Living with someone who has active respiratory TB.
Travel	Planning to live in a high-risk country for more than 3 months.

The UK government provides detailed lists of high-incidence countries to help healthcare providers determine if a child should be referred for vaccination. If a child meets these criteria, the vaccine is usually offered around 28 days after birth, following the results of routine newborn screening for immune conditions. 

How the vaccine works and its effectiveness 

The BCG vaccine works by “priming” the immune system to recognise and fight the TB bacteria. It is between 70% and 80% effective against the most severe forms of the disease in children. However, it is less effective at preventing the respiratory (lung) form of TB that is more common in adults. Because it is a live vaccine, it must be administered carefully by trained professionals. For older children and adults, a skin test called the Mantoux test is often required before vaccination to ensure the person does not already have an underlying TB infection, as the vaccine could cause a severe reaction in those cases. 

Normal reactions and side effects 

Almost everyone who receives the BCG vaccine will experience a specific local reaction at the site of the injection, which is usually the upper left arm. Shortly after the injection, a small raised blister appears. Within two to six weeks, this may turn into a small sore or ulcer. This is a normal sign that the vaccine is working and the immune system is responding. The sore will eventually heal and may leave a small, flat scar. Other common side effects include a mild fever or swollen glands in the armpit. It is important to keep the injection site clean and dry and to avoid using plasters, which can interfere with the healing process. 

Adults and occupational risk 

While the BCG vaccine is rarely given to people over the age of 16, it is sometimes recommended for adults who are at a high risk of exposure through their work. This includes healthcare workers who may be in contact with TB patients or contaminated clinical materials, laboratory staff, and people working in hostels for refugees or prisons. NICE guidelines state that the vaccine is generally not recommended for adults over the age of 35 because there is very little evidence that it provides effective protection at that age. For most adults, the focus remains on early diagnosis and treatment rather than vaccination. 

Conclusion 

The BCG vaccine remains a vital tool in the UK’s effort to control tuberculosis, specifically by protecting vulnerable children from life-threatening complications. While it is no longer a universal vaccine for all teenagers, the targeted programme ensures that those at the highest risk are prioritised. If you believe your child is eligible and has not been offered the vaccine, you should speak with your health visitor or GP. If you experience a sudden, severe headache, confusion, or a very stiff neck, call 999 immediately. 

Authority Snapshot (E-E-A-T Block) 

This article provides educational information on the BCG vaccine within the context of the UK healthcare system. It is written and reviewed by medical professionals to ensure all content is strictly aligned with the latest NHS, NICE, and UK Health Security Agency guidance. Our aim is to provide parents and the public with accurate, evidence-based information regarding immunisation safety and eligibility.