Seasonal flu activity has surged across the United States, with the Centers for Disease Control and Prevention (CDC) reporting a significant increase in both positive influenza tests and healthcare visits for respiratory illnesses. As of the week ending December 13, there was a notable rise of 14.8% in positive influenza tests, alongside a 4.1% increase in visits to healthcare providers due to respiratory complaints.
Three pediatric deaths attributed to influenza have been recorded so far this season, with two of these fatalities occurring in the most recent reporting week. This early spike in severe cases adds to the concerns following last year’s flu season, which saw an alarming total of 287 pediatric deaths— the highest since the 2009-2010 season, during which the H1N1 virus led to an exceptionally early onset of flu activity.
Current Flu Activity Levels and New Strains
According to the latest data from the CDC, five states are currently experiencing “very high” levels of flu activity, while ten additional states report high levels of flu-like symptoms. The CDC calculates flu activity levels by evaluating the proportion of outpatient visits for influenza-like illnesses compared to baseline non-influenza weeks.
This season has also introduced a new strain of the influenza A virus known as subclade K, which has been linked to early surges in flu cases in countries such as the United Kingdom, Canada, and Japan. Among the influenza cases reported by laboratories for the week ending November 29, nearly 90% were identified as the new variant, highlighting its rapid spread.
The CDC continues to monitor these developments closely as flu season progresses, emphasizing the importance of vaccination and preventive measures. Health officials urge the public to remain vigilant, particularly as some states report concerning trends in flu activity and hospitalizations.
As flu season unfolds, individuals are encouraged to consult healthcare professionals for guidance on vaccinations and other preventive strategies to mitigate the impact of influenza.
