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Hib Vaccination can Prevent Pneumonia

Vaccinating infants against H. influenzae type b (Hib), a bacterium that causes deadly Hib pneumonia and meningitis, could save hundreds of thousands of children in Asia.

A new study from Bangladesh published online today in The Pediatric Infectious Disease Journal showed that routine immunization of infants with a Hib conjugate vaccine prevented over one-third of life-threatening pneumonia cases and approximately 90% of Hib meningitis cases. A similar impact would be expected in other parts of the region.

Although countries in Asia with high mortality rates have long known that pneumonia and meningitis are a significant concern, many assumed that Hib was not a major cause.

This vaccine study builds the evidence of the real burden of Hib pneumonia and meningitis as has been shown in other studies in Chile and Indonesia, that is that the proportion of pneumonia and meningitis prevented by the Hib conjugate vaccine is significantly higher than what can be detected through routine surveillance.

There has been an ongoing disagreement about the total burden of Hib pneumonia and meningitis in Asia, but our findings provide evidence challenging the commonly held notion that these diseases are rare in Asia, said Dr Abdullah Baqui, Associate Professor, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA.

Our research shows that routine Hib vaccination is a feasible and highly effective way of preventing death related to Hib pneumonia and meningitis and could save the lives of a significant number of Asian children who die under the age of five.

Bangladesh views Hib vaccine as an integral tool in our mission to improve child survival in Bangladesh, said Dr. Md. Abdul Quader Mian, Deputy Director EPI and Programme Manager Child Health & LCC, Ministry of Health, Bangladesh. This study supported the conclusions of the consultative workshop organized in June 2006 by WHO around the int roduction of the Hib vaccine into Bangladesh.

The study was conducted by researchers from International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR, B), Dhaka Shishu Hospital and John Hopkins University. The vaccine used in the study replaced the routine diphtheria, tetanus and pertussis (DTP) vaccine with a DTP-Hib combination.

The combination vaccine did not require additional injections or visits to benefit from the expanded protection. Bangladesh recently applied for funding from the GAVI Alliance to introduce a DTP-Hepatitis B-Hib pentavalent combination which they hope to introduce into the routine childhood immunization program in 2008.

Despite a growing body of evidence, only 26% of the worlds children live in countries with access to Hib vaccine. This means hundreds of thousands of children in Asian countries are currently not benefiting from this simple, life-saving vaccine. However, Bangladesh, Pakistan, Afghanistan, Sri Lanka and Bhutan have reviewed available evidence and made the decision to introduce Hib vaccine and applied for support from the GAVI Alliance.

We are delighted that so many Asian countries are preparing to introduce the Hib vaccine and protect their children against Hib pneumonia and Hib meningitis said Julian Lob-Levyt, Executive Secretary of the GAVI Alliance. This is a clear indication of these governments commitment to reduce child mortality.

The WHO recommends that all countries adopt Hib vaccine into routine child immunization programs. They estimate that Hib globally is responsible for 400,000 deaths each year in children under five years of age and around 3 million cases of serious illness resulting in long term consequences such as deafness, learning disabilities, paralysis and mental retardation.

This simple, life-saving vaccine can prevent Hib pneumonia and meningitis in children, often called the invisible cause of forgotten chi ld killers in Asia, said Dr. Kent R. Hill, Assistant Administrator, Global Health. Immunization programs, including Hib, are an essential component of USAIDs strategy to prevent life-threatening childhood infections.

These data are clear - Hib vaccine is an important addition to immunization programs through out Asia. Supply studies tell us quality manufacturers from developing countries are coming into the market very soon and prices for this vaccine will be coming down in the very near future. Now is the time for additional Asian countries to make this important addition to the EPI programs.

I commend the GAVI Alliance and the countries of Bangladesh, Pakistan, Afghanistan, Sri Lanka and Bhutan for moving quickly to reduce needless Hib related child deaths.


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