| http://www.w3.org/ns/prov#value | - The incidence of influenza-virus-associated severe pneumonia requiring hospitalization is important because influenza is a vaccine-preventable infection and because respiratory illnesses are among the leading causes of death among children in lower-middle-income countries such as El Salvador.28 During 2008???2010, Ministry of Health hospitals in El Salvador annually admitted approximately 14 000 c
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