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1. Pfizer formally ends its vaccine trial with a 95% success rate.
   2020-11-18 19:04:23 (First version)
2. Pfizer formally ends its vaccine trial with a 95% success rate and will be submit the regulatory approval "within days".
   2020-11-19 01:04:13 (Update)
3. Pfizer formally ends its vaccine trial with a 95% success rate and will submit a regulatory approval "within days".
   (Current version)

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