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Update on the 2009 pandemic influenza A H1N1 in children
1Division of Pediatric Infectious Diseases, Monroe Carell Jr. Children's Hospital at Vanderbilt, Vanderbilt University School of Medicine, 1161 21st Avenue South, D-7235 Medical Center North, Nashville, TN 37232-2581, USA. Natasha.halasa@vanderbilt.edu
Insights
The 2009 pandemic influenza A H1N1 (pH1N1) virus caused mostly mild illness in children, but severe cases, including deaths and neurological complications, occurred, particularly in young children and those with risk factors. Early antiviral treatment is crucial for better outcomes.
Area of Science:
- Pediatric Infectious Diseases
- Virology
- Epidemiology
Background:
- The 2009 pandemic influenza A H1N1 virus emerged globally.
- Understanding its impact on pediatric populations is crucial for public health preparedness.
Purpose of the Study:
- To review the epidemiology of pandemic influenza A H1N1 in children.
- To describe clinical presentations and outcomes in pediatric cases.
- To provide an updated overview of the 2009 H1N1 pandemic in children.
Main Methods:
- Literature review of epidemiological data.
- Analysis of clinical case reports and outcomes.
- Synthesis of findings on pediatric influenza A H1N1.
Main Results:
- Most pediatric 2009 H1N1 cases were mild.
- Severe illness, hospitalization, and deaths occurred, especially in children under 5 and those with high-risk conditions.
- Neurological complications and bacterial coinfections were reported.
Conclusions:
- Pandemic influenza A H1N1 can cause severe disease in children.
- Prompt antiviral treatment (within 48 hours) is recommended for efficacy.
- Monitoring vaccine safety and efficacy in children is important.
Purpose Of Review:
To provide an updated review of the epidemiology, clinical presentations, and outcomes of the 2009 pandemic influenza A H1N1 in children.
Recent Findings:
The majority of cases of 2009 pandemic influenza A H1N1 in children have been mild. However, neurological complications, hospitalization, and even deaths have been reported in children. Death and severe illnesses have mostly occurred in children below 5 years of age and children with high-risk conditions. Coinfections with bacteria have also been reported. Most strains are sensitive to oseltamivir and all to zanamivir.
Summary:
Even though the majority of cases of 2009 pandemic influenza A H1N1 are mild, severe disease does occur in children. In addition, neurological complications and coinfection with bacteria exist. Treatment with antiviral medications should be initiated within 48 h to be most effective. When pandemic H1N1 vaccines become available, the safety and efficacy of these vaccines in this vulnerable population will be important to document.
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