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September was the worst month for new COVID-19 cases and deaths among children in the U.S., according to new data from the American Academy of Pediatrics.

Cases peaked in early September, the data shows, as many schools reopened for in-person classes while the contagious Delta variant surged across the country.

More than 6 million children have tested positive for COVID-19 since the beginning of the pandemic, with more than 1.1 million new cases recorded in September alone. Head over to WebMD to read the full story.