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Continue to ChatPfizer Begins Their Covid Vaccine Trial In Children Under 12 | NBC Nightly News https://avnblogfeed.com/general/staticnews/pfizer-begins-their-covid-vaccine-trial-in-children-under-12-nbc-nightly-news/
Pfizer Begins Their Covid Vaccine Trial In Children Under 12 | NBC Nightly News https://avnblogfeed.com/general/staticnews/pfizer-begins-their-covid-vaccine-trial-in-children-under-12-nbc-nightly-news/