Haemophilus influenzae type b (Hib)

Haemophilus influenzae type b (Hib) is a bacterium that can cause a number of serious illnesses, particularly in young children. It is much rarer than it once was as it is now vaccinated against as part of the childhood immunisation programme in Northern Ireland.

About Hib

Hib infections used to be a serious health problem in Northern Ireland, but the routine immunisation against Hib, given to infants since 1992, means these infections are now rare.

Of the small number of cases that do occur nowadays, most affect adults with long-term (chronic) underlying medical conditions, rather than young children.

Problems caused by Hib

Hib bacteria can cause several serious infections, including:

Many children who develop Hib infections become very ill and need treatment with antibiotics in hospital.

Meningitis is the most severe illness caused by Hib. Even with treatment, 1 in every 20 children with Hib meningitis will die.

Those who survive may have long-term problems, such as:

How Hib is spread

Hib bacteria can live in the nose and throat of healthy people, and usually, don't cause any symptoms. The bacteria are usually spread in a similar way to cold and flu viruses, through infected droplets of fluid in coughs and sneezes.

The bacteria can be spread by healthy people who carry the bacteria, as well as those who are ill with a Hib infection.

Inhaling the infected droplets or transferring them into your mouth from a contaminated surface can allow the bacteria to spread further into your body, causing one of the infections mentioned above.

Hib vaccination

Vaccinating children against Hib has been very effective in cutting rates of Hib infections.

The Hib vaccine is routinely offered to babies as part of the Childhood immunisation programme in Northern Ireland.

Babies have three separate doses of Hib vaccine – at 8, 12 and 16 weeks of age – as part of the 6-in-1 vaccine.

A booster dose is also offered when a child is one year old as part of the Hib/MenC booster to provide longer-term protection.

The information on this page has been adapted from original content from the NHS website.

For further information see terms and conditions.

This page was published September 2018

This page is due for review December 2019

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