As several prominent Republicans call on Biden to resign or be impeached, Mitch McConnell tells a room full of supporters to quiet. Two top FDA vaccine regulators have announced their departure at a time when they're needed for oversight on multiple projects. Some speculate it's due to the administration's push for COVID booster shots. Brazilian researchers have found a molecule in the venom of a native pit viper that may be a new tool in combating COVID. 

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