Pfizer's vaccine could be less effective against the Delta variant, study suggests, even though vaccines help prevent serious illness or death

By Ashley Collman

2021-08-12T10:59:45.000Z

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Ashley was formerly a senior news reporter at Insider. Before joining Insider, she worked as a general assignment reporter at DailyMail.com, where she focused on breaking news across the US. Ashley is a graduate of the S.I. Newhouse School of Public Communications at Syracuse University, where she earned a degree in magazine journalism.