High incidence of severe influenza among individuals over 50 years of age.
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| Description | scientific article |
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author: Ivan Fan Ngai Hung Kelvin Kai-Wang To Jasper Fuk-Woo Chan Sidney Tam Herman Tse Yuen Kwok-yung Honglin Chen Kwok-Hung Chan |
| Publication date | September 7, 2011 |
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