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The delta variant may spread as fast as chickenpox, and other facts about new CDC data

An important component of the CDC document was new data published Friday from a July outbreak in Massachusetts, which CDC Director Rochelle Walensky called “concerning” and “a pivotal discovery.”

Rochelle Walensky, director of the CDC, listens during a Senate Committee hearing on July 20 in Washington. Walensky called new CDC data published Friday from a July outbreak in Massachusetts “concerning” and “a pivotal discovery.”
Rochelle Walensky, director of the CDC, listens during a Senate Committee hearing on July 20 in Washington. Walensky called new CDC data published Friday from a July outbreak in Massachusetts “concerning” and “a pivotal discovery.”Read moreStefani Reynolds / AP