Back in April 2020, AstraZeneca was hailed as a frontrunner in the race to get an effective vaccine to market. A year later, after a series of trial pauses, communication blunders, and PR problems, the vaccine is on the cusp of FDA approval.  By all accounts, the company succeeded in making a safe, effective vaccine. So why has there been so much confusion about its rollout? Guest:    Peter Aldhous, science reporter at Buzzfeed News Host Lizzie O’Leary   Learn more about your ad choices. Visit megaphone.fm/adchoices