New COVID variants Nimbus (NB.1.8.1) and Stratus (XFB) are spreading quickly in the U.S. and Europe. Rising test positivity and wastewater data suggest many infections may not be fully detected.
Common symptoms include severe sore throat, fatigue, headaches, congestion, and persistent cough, leaving many people feeling worse than expected.
Health experts say vaccines and past infections still protect against severe illness. They advise simple precautions: stay home when sick, test if symptoms appear, and protect vulnerable people.
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