Details:

Corporate Authors:
National Center for Immunization and Respiratory Diseases (U.S.). Influenza Division.
Description:
All data are preliminary and may change as more reports are received.

Synopsis: Influenza activity in the United States remains low, although small increases in activity were reported. Influenza A(H1N1)pdm09, influenza A(H3N2), and influenza B viruses continue to co-circulate, with influenza A(H1N1)pdm09 viruses reported most commonly by public health laboratories since September 30, 2018. Below is a summary of the key influenza indicators for the week ending November 3, 2018:

• Viral Surveillance: Influenza A viruses have predominated in the United States since the beginning of July. The percentage of respiratory specimens testing positive for influenza in clinical laboratories was low.

o Virus Characterization:The majority of influenza viruses characterized antigenically and genetically are similar to the cell-grown reference viruses representing the 2018–2019 Northern Hemisphere influenza vaccine viruses.

o Antiviral Resistance:All viruses tested since late May show susceptibility to the antiviral drugs oseltamivir, zanamivir, and peramivir.

• Influenza-like Illness Surveillance: The proportion of outpatient visits for influenza-like illness (ILI) increased slightly to 1.8%, which is below the national baseline of 2.2%. One of 10 regions reported ILI at or above their region-specific baseline level.

• ILI State Activity Indictor Map: One state experienced moderate ILI activity, three states experienced low ILI activity; and New York City, the District of Columbia, Puerto Rico and 46 states experienced minimal ILI activity.

• Geographic Spread of Influenza:The geographic spread of influenza in two states was reported as regional; Guam and six states reported local activity; the District of Columbia, Puerto Rico, the U.S. Virgin Islands and 40 states reported sporadic activity; and two states reported no activity.

• Pneumonia and Influenza Mortality: The proportion of deaths attributed to pneumonia and influenza (P&I) was below the system-specific epidemic threshold in the National Center for Health Statistics (NCHS) Mortality Surveillance System.

• Influenza-associated Pediatric Deaths: No influenza-associated pediatric deaths were reported to CDC for week 44.


Subjects:
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Disease Outbreaks Influenza, Human/epidemiology Public Health Surveillance
Series:
FluView : 2018-2019 influenza season ; week 44
Document Type:
Webpage
Genre:
Statistics
Place as Subject:
United States
Collection(s):
Stephen B. Thacker CDC Library collection
Main Document Checksum:
[+]
urn:sha256:994e22231e332c749b3a8a84d07e6de283de0b28c438c05131ecdd49519661fa
Download URL:
https://stacks.cdc.gov/view/cdc/60424/cdc_60424_DS1.pdf
File Type:

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