Moderna, the maker of one of the Covid-19 vaccines, once was the underdog, the startup that rose to the occasion during the 2020 pandemic. It might be hard to remember that given all that’s happened since. The company has enjoyed massive growth and recognition. Its name is plastered on the walls at Fenway Park and Arthur Ashe stadium, home to the U.S. Open. In size and public profile, Moderna is more Goliath than David these days, a point underscored by its recent filing of a patent infringement lawsuit against Pfizer.