Pfizer -Pharma firm reportedly claims its vaccine was 90% effective in preventing Covid-19 infections in ongoing Phase 3 trials,

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Pfizer -Pharma firm reportedly claims its vaccine was 90% effective in preventing Covid-19 infections in ongoing Phase 3 trials,

https://m.timesofindia.com/dailybrief/79131173.cms?frmapp=yes&utm_source=contentofinterest&utm_medium=text&utm_campaign=cppst

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