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6 results on '"Ma, Chunna"'

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1. Role of presymptomatic transmission of COVID-19: evidence from Beijing, China

2. Reduction of influenza A(H3N2)-associated symptoms by influenza vaccination in school aged-children during the 2014-2015 winter season dominated by mismatched H3N2 viruses

3. Moderate influenza vaccine effectiveness against influenza A(H1N1)pdm09 virus and low effectiveness against A(H3N2) virus among older adults during 2013–2014 influenza season in Beijing, China

4. Influenza vaccine effectiveness against medically attended influenza illness in Beijing, China, 2014/15 season

6. Technical guidelines for the application of seasonal influenza vaccine in China (2014–2015)

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