Share this postPfizer Advent Calendarterrylclark.substack.comCopy linkFacebookEmailNoteOtherPfizer Advent CalendarTerry L. ClarkNov 14, 2023Share this postPfizer Advent Calendarterrylclark.substack.comCopy linkFacebookEmailNoteOtherShareTerry L Clark on Substack is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber.Subscribe