How long does fever last with flu
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Duration of Fever in Influenza: Key Insights
Fever Duration in Infants with Nosocomial Influenza
In a study focusing on infants hospitalized during a community outbreak of influenza A, it was found that fever typically lasted an average of 2.7 days. The peak temperatures ranged from 38.2 to 39.8°C. This study highlighted that infants, particularly those with underlying cardiorespiratory conditions, were at a higher risk of developing complications such as lower respiratory tract disease and secondary bacterial pneumonia .
Fever Duration in Children During Influenza Epidemics
Another study examined the natural course of fever in children infected with various strains of the influenza virus (A/H1N1, A/H3N2, and B) during the 2001-2002 epidemic. The findings indicated that fever duration varied with the age of the child and the strain of the virus. Fever was most prominent in younger children and those infected with the A/H3N2 strain. The study also noted that secondary fevers frequently occurred between 72 to 132 hours after the initial fever onset. Overall, the duration of fever was inversely related to the child's age and directly related to the maximum temperature recorded .
Conclusion
In summary, the duration of fever in influenza cases can vary based on age and underlying health conditions. In infants, fever typically lasts around 2.7 days, while in children, the duration can be influenced by the specific influenza strain and the child's age, with younger children experiencing longer fever durations. Understanding these patterns can help in managing and anticipating the course of the illness in different age groups.
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