Seasonal influenza activity is at or above baseline as of week 46, according to the CDC. Get a snapshot of the data.
Clinical Lab Testing. 7.3% of respiratory specimens tested by clinical laboratories were positive for influenza viruses-higher than the previous week.
Virus Varies by Age Group. Influenza B/Victoria viruses most common among those aged 0-4y (48%) and 5-24y (56%). A(H3N2) viruses most commonly reported among those aged ≥65y (70%).
Outpatient Illness. 2.5% of visits to health care providers were for influenza-like illness (ILI). ILI was above the national baseline of 2.4% for the first time. Four of 10 regions were at or above their baselines.
Outpatient Illness Spread. # of jurisdictions experiencing high ILI activity increased from 1 last week to 8 this week. # of jurisdictions reporting regional or widespread activity increased from 10 last week to 15 this week.
Pneumonia & Influenza Mortality. 5.2% of deaths were attributed to pneumonia and influenza (P&I). This is below the epidemic threshold of 6.2%. Analysis based on NCHS mortality surveillance data available on November 21, 2019, comparing week ending November 9, 2019 (week 45) to week 46, ending November 16, 2019.
Pediatric Deaths. One new influenza-associated pediatric death occurring during the 2019-2020 season was reported to CDC this week. The current total for the season is 4 deaths.
Hospitalizations. There have been 393 hospitalizations so far this year. The overall hospitalization rate for the season is 1.4 per 100,000. This is similar to what has been seen at this time during other recent seasons.
Hospitalizations by Age Group. Overall rate: 1.4 per 100,000; highest among adults aged ≥65y (3.6 per 100,000), followed by children aged 0-4y (2.2 per 100,000), and by adults aged 50-64y (1.4 per 100,000).
Of the 393 Hospital Admissions: Influenza A: 246 (62.6%); influenza B: 142 (36.1%); co-infection: 3 (0.8%); 2 admissions: flu virus that had not been typed.
For the full report and archived seasonal influenza data, please see: CDC FluView. Published online November 22, 2019. Full text
CDC seasonal influenza surveillance data for week 46 of the 2019-2020 season show influenza-like illness (ILI) activity nationwide has been at or above baseline for about 2 weeks and that the activity varies by region â the south and west seeing an increase but other areas of the country seeing low activity. Older adults and the very young are affected most.The 10 slides below offer a snapshot of the CDC's FluView Weekly Update for the week ended November 16, 2019.