Posted on July 3, 2013
SummaryThis document is an update to interim enhanced surveillance guidance posted in 2012. In anticipation of the 2013 agricultural fair season, states should consider expanding surveillance to include reverse-transcription polymerase chain reaction (RT-PCR) testing of specimens from ILINet providers statewide, of specimens collected from people with ILI reporting recent swine contact or agricultural fair attendance, and of specimens collected from people with unusual or severe presentations of ILI. States should also consider collection of specimens from outbreaks of ILI among children in child-care and school settings, since these settings have been associated with person-to-person H3N2v virus transmission in 2011. CDC will continue to evaluate new information as it becomes available and will update this guidance as needed.