NCT00013715|Completed
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Sponsor study identifier
observational
60
1 country
1
Study Start
September 1999
Date type not reportedThis date has not been verified as actual or estimated.
Primary Completion
Not reported
Date not reportedStudy Completion
August 2003
Date type not reportedThis date has not been verified as actual or estimated.
In the U.S., morbidity associated with human rhinovirus (RV) infection represents a major health problem. In asthmatics, up to 80% of asthma exacerbations are associated with upper respiratory infections. Despite evidence that environmental oxidant pollutants, such as ozone, may increase the severity of viral disease, the mechanisms underlying such an effect have not been identified. This study will test the hypothesis that exposure of allergic asthmatic subjects to ambient levels of ozone directly enhances viral disease by increasing infectivity and intensifying virus-induced inflammation.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
August 2003
Date type not reportedThis date has not been verified as actual or estimated.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
September 1999
Date type not reportedThis date has not been verified as actual or estimated.
March 28, 2001
Actual (reported)March 30, 2001
Actual (reported)August 2003
Date type not reportedThis date has not been verified as actual or estimated.
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The Johns Hopkins School of Hygiene and Public Health
Baltimore, Maryland, 21205, United States
First Submitted
March 28, 2001
First Posted
March 30, 2001
Study Start
September 1999
Date type not reportedThis date has not been verified as actual or estimated.
Study Completion
August 2003
Date type not reportedThis date has not been verified as actual or estimated.
Genetic Susceptibility to Childhood Respiratory IIlness in Mexico City
Last Updated
August 11, 2008
Record last verified: 2008-08
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Source: ClinicalTrials.gov.
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