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Centers for Disaster Control and Prevention. Current epidemic expansion (based on Rt) for states and territories.
Centers for Disaster Control and Prevention. COVID Data Tracker: Variant Surveillance Overview.
Centers for Disaster Control and Prevention. What is COVID-19 reinfection?
Centers for Disaster Control and Prevention. Vaccination – adults.
Centers for Disaster Control and Prevention. Symptoms of COVID-19.
Centers for Disaster Control and Prevention. Avoid breathing in viruses when you are sick.
Centers for Disaster Control and Prevention. COVID-19: How to with yourself and others.