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  • Content Type: Abstract

    The H1N1 outbreak in the spring of 2009 in NYC originated in a school in Queens before spreading to others nearby. Active surveillance established epidemiological links between students at the school and new cases at other schools through… read more
    … percentage of enrollment and total influenza-like illness visits. For each day, the observed values were compared with … significant activity: 28 April 2009–30 April 2009 and 13 May 2009–1 June 2009. The former period reported nine … schools have increased absenteeism or school nurse visits. The analysis has a couple of limitations: (1) a …