National Influenza Activity:
According to this week’s FluView report, seasonal influenza activity in the United States increased slightly, but remains low.
Below is a summary of the key influenza indicators for the week ending October 19, 2019:
Viral Surveillance - Clinical Lab: 2.4% of respiratory specimens tested in clinical laboratories were positive for influenza viruses. This is slightly lower than the previous week.
Viral Surveillance - Public Health Lab: Influenza A (H3N2) and Influenza B/Victoria viruses have circulated at similar levels for the season overall.
Virus Characterization: Influenza virus characterization information will be updated weekly starting later this season.
Antiviral Resistance: Influenza virus antiviral resistance will be updated weekly starting later this season.
Outpatient Illness: 1.7% of visits to a health care provider were for influenza-like illness (ILI). ILI activity is higher than the previous week but remains below the national baseline of 2.4%. The majority of jurisdictions experienced minimal ILI activity; however, Louisiana and Puerto Rico experienced high ILI activity.
Geographic Spread of Influenza: The majority of jurisdictions reported sporadic or local activity; however, Maryland reported widespread activity and Louisiana reported regional activity.
Influenza-associated Hospitalizations: Hospitalization rates will be updated weekly starting later this season.
Pneumonia and Influenza Mortality: 4.9% of deaths were attributed to pneumonia and influenza (P&I). This is below the epidemic threshold of 5.7%.
Influenza-associated Pediatric Deaths: The first 2 influenza-associated pediatric deaths occurring during the 2019-2020 season were reported to CDC this week.