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Continue to ChatOne COVID-19 strain could 'break through' the Pfizer vaccine, early results show https://abc7.news/one-covid-19-strain-could-break-through-the-pfizer-vaccine-early-results-show.html
One COVID-19 strain could 'break through' the Pfizer vaccine, early results show https://abc7.news/one-covid-19-strain-could-break-through-the-pfizer-vaccine-early-results-show.html