A healthcare worker collects vials of the AstraZeneca Plc Covid-19 vaccine from a fridge. (Photographer: I-Hwa Cheng/Bloomberg)
(Bloomberg Businessweek) -- The Covid-19 vaccine rollout has given drugmakers the kind of brand-name shorthand usually reserved for more mundane consumer products: People talk about getting Pfizer, Moderna, J&J, or Astra much as they might reach for a Kleenex or a Popsicle. And those companies have contracts to provide billions of doses, appearing to leave little room for other entrants. So why are dozens of hopefuls still working ...