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Covid-19 cases are surging in 46 states. In one hot spot, hospitalized patients are younger than ever, doctor says
By Holly Yan & Madeline Holcombe
The Delta Variant May Cause Different COVID-19 Symptoms
By Carla M. Delgado
The Delta Dilemma: Loosening Covid-19 Controls At A Time Of Increased Danger
By William A. Haseltine