Small increases in influenza activity occurred in the United States during the week of November 10, but activity is still low, according to the US CDC.

At 1.9%, the nationwide percentage of patient visits reported through the US Outpatient Influenza-like Illness Surveillance Network for influenza-like illness (ILI) remained below the national baseline of 2.2%. They define ILI as having a body temperature of 100 °F (37.8 °C) or greater and cough and/or sore throat.

The proportion of deaths resulting from pneumonia and influenza (P&I) was lower than the system-specific epidemic threshold in the National Center for Health Statistics (NCHS) Mortality Surveillance System. NCHS mortality data published November 15 showed that 5.4% of the deaths that occurred during week 45 resulted from P&I — “below the epidemic threshold of 6.2% for week 44” — the CDC notes in its weekly US Influenza Surveillance Report for the week ending November 10.