Here's why North Texas is experiencing an earlier flu season

Key Points:

• North Texas is experiencing an early start to the flu season, with Texas ranked among five states showing moderate flu activity as of October 31, according to CDC data.
• Dallas County reported a nearly 14% influenza test positivity rate for the week ending October 31, and Children’s Health saw a 26% increase in flu cases from late October to early November.
• The early flu surge is attributed to a mutated H1N1 strain (D.3.1.1), which has undergone antigenic drift, making it more capable of evading immune responses; this strain has accounted for 80% of U.S. influenza cases since late May.
• The CDC recommends annual flu vaccination for everyone six months and older, noting that current vaccines protect against H1N1, H3N2, and Influenza B strains and can reduce severity even if not fully preventing infection.
• Flu symptoms include fever, chills, sore throat, and body aches; those infected should rest, stay hydrated, and avoid contact with others to prevent spread, seeking medical care if in a high-risk group or severely ill.