Influenza vaccination and asthma: current studies and recommendations.

Influenza vaccination and asthma: current studies and recommendations. Research Abstract Details 

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Influenza vaccination and asthma: current studies and recommendations. Abstract Text:

I Stephenson,K G Nicholson,

Influenza is an important epidemic and pandemic illness associated with serious morbidity and mortality in unprotected communities. Patients at increased risk of infection are those with pre-existing cardiopulmonary disease including asthma. The influenza virus has the ability to produce antigenic changes posing problems for vaccine development. Influenza vaccines have been available for over 50 years. Despite the continuing global threat posed by infection and recommendations in many countries that immunisation should be widely given, uptake rates are variable and often poor. It has been demonstrated that infection with influenza and other respiratory viral pathogens can produce exacerbations of asthma throughout the age groups. Despite this, vaccine uptake rates in asthmatic populations are quite low. Poor uptake rates are attributed to a number of factors and we review the evidence for the widely held view that influenza vaccination produces exacerbations of chronic airflow obstruction including asthma. Observational studies have found conflicting results: some post immunisation changes in bronchial hyperreactivity and increased requirements of bronchodilator therapy have been in some, but not all, studies. Placebo-controlled trials have not demonstrated any clinical deterioration although one study showed a small reduction in peak expiratory flow rate. Intranasal administration of cold-adapted live vaccines and new nucleic acid vaccines are briefly considered. Live adapted vaccines have been shown to be effective in influenza immunoprophylaxis and limited data on their use in patients with asthma suggest that they can be administered safely. In conclusion, based up on current studies and evidence, it seems likely that influenza infection produces morbidity in patients with asthma but that any potential adverse effects of influenza immunisation are outweighed by the benefits in this population. However, placebo-controlled trials are few and only small numbers of asthmatic patients have been investigated.

Influenza vaccination and asthma: current studies and recommendations. Publishing Authors By Initials

I Stephenson,KG Nicholson,

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Influenza vaccination and asthma: current studies and recommendations. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: BioDrugs : clinical immunotherapeutics, biopharmac

VOLUME: 11

Page Numbers: 223-8

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ISSN: 1173-8804

DAY: 22

MONTH: Apr

YEAR: 1999

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LANGUAGE: eng

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AFFILIATION: Department of Infectious Diseases and Tropical Medicine, Leicester Royal Infirmary, Leicester, England.

Country: New Zealand

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MEDLINETA: BioDrugs

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