RT @Reuters: Pfizer and BioNTech say their COVID-19 vaccine is more than 90% effective https://t.co/opdJE7dgjF https://t.co/CxMTk4WDBr
RT @Reuters: Pfizer and BioNTech say their COVID-19 vaccine is more than 90% effective https://t.co/opdJE7dgjF https://t.co/CxMTk4WDBr
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