Early Immune Responses to H1N1 Influenza Virus Infection
Author Information
Author(s): Qiu Chao, Tian Di, Wan Yanmin, Zhang Wanju, Qiu Chenli, Zhu Zhaoqin, Ye Ruiqi, Song Zhigang, Zhou Mingzhe, Yuan Songhua, Shi Bisheng, Wu Min, Liu Yi, Gu Shimin, Wei Jun, Zhou Zhitong, Zhang Xiaoyan, Zhang Zhiyong, Hu Yunwen, Yuan Zhenghong, Xu Jianqing
Primary Institution: Shanghai Public Health Clinical Center, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
Hypothesis
Can early humoral immune responses predict virus clearance in humans infected with the 2009 H1N1 influenza virus?
Conclusion
The study found that early IgM responses to the 2009 H1N1 influenza virus are associated with subsequent IgG responses but play a minor role in virus clearance.
Supporting Evidence
- 84.7% of 2009 H1N1 infected patients tested positive for IgM antibodies within days of symptom onset.
- The sensitivity of the IgM assay was found to be 94.9% with a specificity of 82.5%.
- IgM levels were not significantly associated with viral loads or patient demographics.
Takeaway
When people get sick with the flu, their bodies make a special kind of antibody called IgM really quickly, which helps them fight the virus.
Methodology
The study analyzed serum samples from 131 patients infected with the 2009 H1N1 virus, measuring IgM and IgG antibody levels and their correlation with viral load and clearance.
Potential Biases
Potential biases may arise from the selection of patients and the timing of sample collection.
Limitations
The study's findings may not be generalizable beyond the specific population studied, and the role of other immune responses was not fully explored.
Participant Demographics
Patients were hospitalized individuals diagnosed with 2009 H1N1 infection in Shanghai, China.
Statistical Information
P-Value
p<0.0001
Confidence Interval
[34.10–220.39]
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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