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The COVID-19 virus is continually changing, and a recent variant — a descendant of omicron — is rapidly climbing the charts. sasirin pamai / Shutterstock.com
Editor’s Note: This story originally appeared on KFF Health News. It’s winter, that cozy season that brings crackling fireplaces, indoor gatherings — and a wave of respiratory illness. Nearly four years since the pandemic emerged, people are growing weary of dealing with it, but the virus is not done with us. Nationally, a sharp uptick in emergency room visits and hospitalizations for covid-19…