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Quad-Demic Hits US: Flu, COVID, RSV Surge This Winter

12/10/2025

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Summary

Story summary

A quad-demic is emerging in the United States this winter as Covid, RSV, norovirus, and influenza surge.
H3N2 strain does not match this year's vaccine and causes severe illness among vulnerable populations.
Centers for Disease Control and Prevention (CDC) reports millions of flu cases since October as hospitalizations rise in Massachusetts and Iowa where schools have closed.
Hospitals are reinstating mask mandates to protect patients while health officials urge vaccination.

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Story summary

A quad-demic is emerging in the United States this winter as Covid, RSV, norovirus, and influenza surge.
H3N2 strain does not match this year's vaccine and causes severe illness among vulnerable populations.
Centers for Disease Control and Prevention (CDC) reports millions of flu cases since October as hospitalizations rise in Massachusetts and Iowa where schools have closed.
Hospitals are reinstating mask mandates to protect patients while health officials urge vaccination.