Vaccine supply chains bend but don't break as firms rise to challenges

It’s been one terrible year, but it’s worth taking a moment to appreciate how corporate America has risen to the challenges of the moment — especially when it comes to manufacturing and transporting essentials like vaccines. Supply chains have been tested in ways they never have been before and, yes, there have been pileups, shortages and other snafus. By and large, though, companies have figured it out and kept moving, at times under impossible circumstances. 

Shares of Pfizer Inc. fell on Thursday after the Wall Street Journal reported the company would deliver only 50 million doses of its vaccine this