What are the main symptoms of norovirus according to the CDC?

Common norovirus symptoms include nausea, vomiting, diarrhea, and stomach cramping, sometimes accompanied by fever or body aches.

Is the current flu vaccine effective against the new H3N2 strain?

While a new H3N2 strain might be mismatched, early evidence suggests the vaccine still provides good protection against severe flu illness.

Where can I get flu and COVID-19 vaccines this holiday season?

Pharmacies like CVS and Walgreens are common places to get seasonal vaccines, often offering walk-ins or online appointments.

Home / Health / Holiday Germs Spike: Flu, Norovirus, COVID-19 Surging

Holiday Germs Spike: Flu, Norovirus, COVID-19 Surging

22 Dec, 2025

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Summary

Norovirus is the leading cause of foodborne illness in the U.S.
A new H3N2 flu strain may be mismatched with the current vaccine.
Vaccination remains the most effective prevention for flu and COVID-19.

Holiday Germs Spike: Flu, Norovirus, COVID-19 Surging

As the holiday season unfolds, a surge in common winter illnesses, including influenza, norovirus, and COVID-19, is impacting the United States. These highly contagious diseases spread easily during gatherings in cold weather and close indoor settings. Wastewater data indicates a downward trend in norovirus, though it remains a significant cause of foodborne illness with symptoms like nausea and vomiting.

Influenza activity is notably increasing, with projections showing growth in 47 states. A mutated H3N2 strain, subclade K, presents a challenge as it may be mismatched with the current flu vaccine. However, early evidence suggests the vaccine still offers protection against severe illness from this variant. COVID-19 cases are also on the rise in numerous states, prompting continued vigilance.

Health authorities strongly advise preventative measures such as frequent handwashing, thorough cooking of food, and practicing good hygiene. Despite the late season, vaccination for both flu and COVID-19 is highlighted as the most effective defense against severe outcomes. Pharmacies are readily accessible locations for obtaining these vital immunizations.